The discounted price per yard for ribbons and for fabrics is A. Ribbon costs $ 1. 50 per yard and fabric costs $ 5. 75 per yard.
How to find the discounted price ?You can find the discounted price by using the options and then multiplying the prices given, by the purchases of Gwen and Penelope to find out which price is right.
If the discounted price of ribbons were $ 1.50 per yard and the fabric was $ 5. 75 per yard, then the cost to Gwen would be:
= ( 1. 50 x 6 ) + ( 10 x 5. 75 )
= $ 66. 50
For Penelope :
= ( 1. 50 x 5 ) + ( 8 x 5. 75 )
= $ 53. 50
These are the amounts spent so these are the discounted prices.
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I'LL MARK THE BRAINLIEST
A car salesperson had $85,460 in total monthly sales in September and $74,570 in October. The salesperson earned a total of $3,485 in commission from those sales combined.
What is the salesperson's commission as a percent of the total monthly sales?
commission percentage = 2.18%
What is percentage ?Percentage is a way of expressing a proportion or a fraction as a fraction of 100. It is denoted by the symbol "%". For example, if there are 50 red marbles out of 100 marbles in a jar, the percentage of red marbles in the jar would be 50%.
To find the salesperson's commission as a percent of the total monthly sales, we first need to calculate the total monthly sales for September and October combined:
Total monthly sales = September sales + October sales
Total monthly sales = $85,460 + $74,570
Total monthly sales = $160,030
Next, we can divide the commission earned by the total monthly sales and multiply by 100 to get the commission as a percentage:
Commission percentage = (Commission earned / Total monthly sales) x 100
Commission percentage = ($3,485 / $160,030) x 100
Commission percentage = 2.18%
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What is the coordinate of A’ after Triangle ABC is reflected across the y-axis?
Answer:
The rule for a reflection over the y -axis is (x,y)→(−x,y) .
A'(-(x) ; y)
A'(-(-5) ; 3)
A'(5 ; 3)
A restaurant has 8 quarts of pudding. They serve the pudding in cups that hold 1/6 of a quart. How many cups of pudding could be made?
Therefore , the solution of the given problem of fraction comes out to be the restaurant could make 48 cups of pudding from the 8 quarts they have.
Fraction : What is it ?An whole can be represented by any set of related sums or fractions. In standard English, a percentage is used to represent the quantity of a specific size. 8, 3/4. Also wholes are fractions. Numbers are expressed in mathematics using the ratio of it's own portion to the bottom. These fractions are all made up of basic numbers. Due to variances in actual percentage calculations, numerators, and numerators, a difficult fraction contains a fraction. A measurement that reflects a portion of the whole is a percentage.
Here,
There are different ways to approach this problem, but one possible method is to use unit conversions to find how many cups are in 8 quarts, and then divide by 1/6 of a quart per cup.
1 quart = 4 cups (by definition of quart)
Therefore, 8 quarts = 8 x 4 cups = 32 cups
1/6 of a quart = 1/6 x 4 cups = 2/3 cups
Therefore, the number of cups of pudding that could be made is:
32 cups / (2/3 cups) = 48 cups
Therefore, the restaurant could make 48 cups of pudding from the 8 quarts they have.
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What is the area of the figure?
6 ft
5 ft/
4 ft
3 ft
The area of the sector is 16.1 ft².
What is the area of a sector?The formula for the area of a sector of a circle is given as;
A = θ/360⁰ x ( r² )
where;
r is the radius of the circle andθ is the angle of the sectorThe angle of the sector is calculated as follows;
sin (θ/2) = 3 / 5
sin (θ/2) = 0.6
θ/2 = sin⁻¹ ( 0.6 )
θ/2 = 36.87⁰
θ = 2 x 36.87⁰
θ = 73.74⁰
The area of the sector is calculated as;
A = (73.74 / 360 ) x π (5²)
A = 16.1 ft²
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A clothing business finds there is a linear relationship between the number of shirts, x, it can sell and price, p, it can charge per shirt
In particular, historical data shows that 12000 shirts can be sold at a price of $29, while 18000 shirts can be sold at a price of $5
Express the data as ordered pairs:
Determine the average rate of change (slope) between the data values:
Round the value of your slope to three decimal places
Create a linear equation (p(x) = mx + b or p(x) = m(x-x1) +y1 for the price p they can charge for x shirts.
p(x) =
Use your equation to predict the price they can charge for 7500 shirts:
Based on given question, average rate of change or slope is-0.004 and
the predicted price for 7500 shirts is $47.
Analysis of Linear Relationship between Number of Shirts Sold and PriceThe ordered pairs for the historical data are:
(12000, 29) and (18000, 5)
To find the slope (average rate of change) between these two data points, we can use the formula:
slope = (change in y) / (change in x)
slope = (5 - 29) / (18000 - 12000)
slope = -24 / 6000
slope = -0.004
Rounding to three decimal places, the slope is -0.004.
To find the linear equation, we can use the point-slope form of a line:
y - y1 = m(x - x1)
Using the point (12000, 29) and the slope we just calculated, we get:
p - 29 = -0.004(x - 12000)
Simplifying and solving for p, we get:
p(x) = -0.004x + 77
Therefore, the equation for the price p they can charge for x shirts is p(x) = -0.004x + 77.
To predict the price they can charge for 7500 shirts, we can substitute x = 7500 into the equation:
p(7500) = -0.004(7500) + 77
p(7500) = 47
Therefore, the predicted price for 7500 shirts is $47.
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In complete sentences, answer the following: Is 8,000 a good estimate for the sum of 3,816 and 467? 1:If it is, explain why it is a good estimate. 2:it is not, explain why it is a bad estimate.
Answer:
No, 3,816+467 is not a good estimate! 3,816 is very far from 8,000. 467 is a very low number to be added to 3,816. most likely when you add the two you will get a low number. when you add the two you get 4,283 which is not even close to the number you are trying to reach!
Step-by-step explanation:
hope this helps!
Why is the numerator greater than the denominator in a fraction that is equivalent to a percent greater than 100?
When a fraction is equivalent to a percentage greater than 100, it means that the numerator represents a value that is greater than the denominator.
What is the percentage?A percentage is a way to express a number as a fraction of 100. For example, 50% is the same as 50/100, which simplifies to 1/2.
Suppose we have a fraction that is equivalent to a percentage greater than 100, such as 125%. This means that the fraction represents 125 parts out of 100, or 125/100.
To simplify this fraction, we can divide both the numerator and denominator by the greatest common factor(GCF), which is 25 in this case. This gives us:
125/100 = (125 ÷ 25)/(100 ÷ 25) = 5/4
As we can see, the numerator (5) is greater than the denominator (4). This is because the original percentage value (125%) is greater than 100%, which means the fraction must have a numerator that is greater than the denominator to reflect this increase.
In general, if a fraction is equivalent to a percentage greater than 100, its numerator will be greater than its denominator because the percentage value represents a quantity that is greater than the whole (100%).
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What is the approximate length of side a? A. 6.62 m B. 8.78 m C. 13.77 m D. 18.21 m
Answer:
C. 13.77 m
Step-by-step explanation:
The sum of the three angles of a triangle is 180°
In the given triangle, two of the angles are 37° and 90°
Third angle = 180 - (37 + 90) = 53°
By the law of sines, ratio of a side to the sine of the opposite angle is the same for all sides and their opposite angles
∴
[tex]\dfrac{a}{\sin 90} = \dfrac{11}{\sin 53}\\\\\sin 90 = 1\\\sin 53 = 0.7986\\\\\rightarrow \dfrac{a}{1} = \dfrac{11}{0.7986}\\\\a = 13.7735\\\\a\approx 13.77\; m[/tex]
Answer:i think the answer is D but it could be C but i know for a fact it is definitely not A or B
Step-by-step explanation:
Which transformations can be used to show that circle P is similar to circle Q? Circle P: center (2, −3) and radius 4 Circle Q: center (2, 3) and radius 28 Select each correct answer. Responses Circle Q is a translation of circle P, 6 units left. Circle , Q, is a translation of circle , P, , 6 units left. Circle Q is a dilation of circle P with a scale factor of 7. Circle , Q, is a dilation of circle , P, with a scale factor of 7. Circle P is a dilation of circle Q with a scale factor of 24. Circle , P, is a dilation of circle , Q, with a scale factor of 24. Circle Q is a translation of circle P, 6 units up.
The correct statements of the given ones are -
Circle Q is a dilation of circle P with a scale factor of 7.Circle Q is a translation of circle P (6 units up).What are similar circles?Two circles are said to be similar if the ratio of their corresponding radius, circumferance and areas are proportionally constant.
Given are the two circles such that circle P is similar to circle Q.
{ 1 } -
Circle Q is a dilation of circle P with a scale factor of 7.
Proof :
r{Q}/r{P} = 28/4 = 7
{ 2 } -
Circle Q is a translation of circle P, 6 units up.
Proof :
Apply the rule (x, y + 6) to the coordinate (2, -3), we get (2, 3).
Therefore, the correct statements of the given ones are -
Circle Q is a dilation of circle P with a scale factor of 7.Circle Q is a translation of circle P (6 units up).To solve more questions on dilations, visit the link below -
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Meg rowed her boat upstream a distance of 45 mi and then rowed back to the starting point. The total time of the trip was 18 hours. If the rate of the current was 6 mph, find the average speed of the boat relative to the water
The solution is, the average speed of the boat relative to the water is 9 mph
What is speed?Speed is measured as distance moved over time. The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in metres (m) and time is in seconds (s), so the units will be in metres per second (m/s).
Speed = Distance/ Time
here, we have,
Let x represent the speed of the boat.
The rate of the current was 7 mph,
Assuming the boat travelled against the current while going upstream, the total speed would be x - 7
Assuming the boat in the direction of the current while going downstream, the total speed would be x + 7
Time = speed × time
Since she travelled 32 miles upstream and 32 miles downstream, then,
Time taken to go upstream = 32/(x -7)
Time taken to go downstream = 32/(x + 7)
Since the total time of the trip was 18 hours, then
32/(x -7) + 32/(x + 7) = 18
Cross multiplying by (x - 7)(x + 7), it becomes
32(x + 7) + 32(x - 7) = 18[(x - 7)(x + 7)
32x + 224 + 32x - 224 = 18(x² + 7x - 7x - 49
32x + 32x = 18x² - 882
18x² - 64x - 882 = 0
Dividing through by 2, it becomes
9x² - 32x - 441 = 0
9x² + 49x - 81x - 441 = 0
x(9x + 49) - 9(9x + 49) = 0
x - 9 = 0 or 9x + 49 = 0
x = 9 or x = - 49/9
Since the speed of the boat cannot be negative, then x = 9
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Defective rate. A machine that produces a special type of transistor (a component of computers) has a 2% defective rate. The production is considered a random process where each transistor is independent of the others.
(a) What is the probability that the 10th transistor produced is the first with a defect?
(b) What is the probability that the machine produces no defective transistors in a batch of 100?
(c) On average, how many transistors would you expect to be produced before the first with a defect? What is the standard deviation?
(d) Another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. On average how many transistors would you expect to be produced with this machine before the first with a defect? What is the standard deviation?
(e) Based on your answers to parts (c) and (d), how does increasing the probability of an event a?ect the mean and standard deviation of the wait time until success?
a) Note that the probability that the 10th transistor produced is the first with a defect is: ≈ 0.0171
b) The probability that the machine produces no defective transistors in a batch of 100 is: ≈ 0.1338
c) The expected value of a geometric distribution is 1/p, so the expected number of transistors before the first defective one is: = 50
d) The expected value and standard deviation for the number of transistors produced before the first with a defect is ≈ 18.71
e) Increasing the probability of an event affects the mean and standard deviation of the wait time until success in opposite ways.
What is the rationale for the above responses?(a) Since each transistor is independent, the probability that the 10th transistor produced is the first with a defect is the same as the probability that the first 9 transistors are not defective and the 10th one is defective. The probability that a transistor is not defective is 1 - 0.02 = 0.98. Therefore, the probability is:
P(1st defective on 10th) = (0.98)⁹ x 0.02 ≈ 0.0171
(b) The probability that the machine produces no defective transistors in a batch of 100 is:
P(no defects in 100) = (0.98)¹⁰⁰ ≈ 0.1338
(c) The number of transistors produced before the first with a defect follows a geometric distribution with parameter p = 0.02. The expected value of a geometric distribution is 1/p, so the expected number of transistors before the first defective one is:
E(X) = 1/p = 1/0.02 = 50
The variance of a geometric distribution is (1-p)/p², so the standard deviation is:
σ = √((1-p)/p²)
= √(0.98/0.0004)
≈ 22.36
(d) The expected value and standard deviation for the number of transistors produced before the first with a defect are calculated in the same way as in (c), but with a different value of p:
E(X) = 1/p = 1/0.05 = 20
σ = √((1-p)/p₂)
= √(0.95/0.0025)
≈ 18.71
(e) Increasing the probability of an event affects the mean and standard deviation of the wait time until success in opposite ways.
As the probability of an event increases, the expected wait time until success decreases. In other words, the mean becomes smaller. However, as the probability of an event increases, the variability in the wait time until success also increases.
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Answer:
(a) 0.0167
(b) 0.1326
(c) The expected value, mean, μ = 50 SD, σ = 49.4975
(d) The expected value, mean, μ = 20 SD, σ = 19.4936
(e) Increasing the probability of an event decreases the mean and standard deviation of the wait time until success.
Step-by-step explanation:
ANSWERS NEEDED ASAP 50 POINTS
1. what is the y-intercept when the coordinate is 9,1 and the slope is 4 8
2. What is the y intercept when the coordinate is -3,-3 and the slope is -1
1. The y-intercept when the coordinate is 9,1 and the slope is 4 8= -35
2. The y intercept when the coordinate is -3,-3 and the slope is -1= -6
What is the purpose of coordinate geometry?The term "coordinate geometry" refers to the study of geometry using coordinate points (or analytic geometry). Coordinate geometry allows for a variety of operations, like measuring the distance between two points, segmenting lines into m:n pieces, determining a line's midpoint, calculating a triangle's area in the Cartesian plane, and more.
1.To find the y-intercept, we can use the slope-intercept form of a linear equation: y = mx + b, where m is the slope and b is the y-intercept.
Given the point (9,1) and slope 4 8, we can plug in these values to get:
1 = (4 8)9 + b
Simplifying this equation, we get:
1 = 36 + b
b = -35
Therefore, the y-intercept is -35.
2. Again, using the slope-intercept form of a linear equation, we have:
y = mx + b
Given the point (-3,-3) and slope -1, we can plug in these values to get:
-3 = (-1)(-3) + b
Simplifying this equation, we get:
-3 = 3 + b
b = -6
Therefore, the y-intercept is -6.
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Will award brainliest need help on a few questions.
Answer:
32 degrees
Step-by-step explanation:
We know that the two opposite angles are equivalent so we need to figure out what each one equals.
First we find what x equals so:
9x - 55 = 5x + 21
When we solve for x we get 19 so we can put this back into the expression to find out the first angle
5(19) + 21 = 116
Since we know both sides are 116 we can add them and get 232
We know now that since all sides all add to 360 we can do
360-232= 128
then split 128 in two for the left and right sides we get 64 degrees
Since the line VU bisects the left angle we know the angle WOV is half of 64 which is:
32 degrees
subtract the polynomials (6x^7-x+8)-(x^7+2)
Answer:
[tex]5x^{7} -x+2[/tex]
Step-by-step explanation:
[tex]6x^{7} -x+8[/tex] minus [tex]x^{7} +2[/tex] equals to [tex]5x^{7} -x+2[/tex].
We can solve this by subtracting [tex]x^{7}[/tex] from [tex]6x^7[/tex]. This will make it [tex]5x^7[/tex].
x cannot be subtracted, so it becomes [tex]5x^7 -x[/tex].
8-6 is 2, so it becomes [tex]5x^7-x+2[/tex]
The winner of the 1998 Peoria 500 (mile) race was Serge Bologna, with an average rate
of 123.362 mi per hr. What was his time (to the nearest thousandth of an hour)?
Time is 4.053 hours (to the nearest thousandth of an hour).
What is average rate?
This refers to the change in speed over a selected period of time. It depends on when you take the measurements. •
Solving for average rate:
Average Rate = 123.362 mi per hr
Distance = 500 (mile)
Time =?
Average Rate = Distance
Time
123.362 mi per hr = 500 (mile)
Time
Making time subject of the formular we have:
Time = 500 (mile)
123.362 mi per hr
Time = 4.053 hrs
Time is 4.053 hours (to the nearest thousandth of an hour).
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Evaluating lim x approaching pi/3 [tex](sin(3\sqrt{2} /\pi -sec(3x/4)+\pi/6))[/tex]. Enter an exact answer.
The required value of the given expression of limit is 1/2.
What is the limit?In mathematics, a limit is a fundamental concept that describes the behavior of a function as its input approaches a certain value or point. In particular, the limit of a function at a point is the value that the function approaches as its input gets arbitrarily close to that point, whether from the left or the right.
Here,
Given expression,
[tex]=\lim_{x \to \\ \pi /3} sin(3\sqrt{2}x/\pi - sec(3x/4) + \pi/6)[/tex]
Put x = π/3
= sin (3√2 × π/3 × 1/π - sec (3/4 × π / 3) + π /6)
= sin(√2 - sec(π/4) + π/6)
= sin(√2 - √2 + π/6)
= sin(π/6)
= 1/2
Thus, the required value of the given expression of limit is 1/2.
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A theatre contains 487 seats and the ticket prices for a recent play were $47 for adults and $ for29 children. If the total proceeds were $17,525 for a sold-out matinee, how many of each type of ticket were sold?
Answer:
40x + 17(468-x) = 11912
23x = 11912 - 17*468 |Solve for x and then find (468-x) as well
At a sports event, a fair coin is flipped to determine which team has possession of the ball to start. The coin has two sides, heads, (H), and tails, (T). Identify the correct experiment, trial, and outcome below: Select all that apply: a. The experiment is identifying whether a heads or tails is flipped. b. The experiment is flipping the coin c. A trial is flipping a heads. d. A trial is one flip of the coin. e. An outcome is flipping a tails. f. An outcome is flipping a coin once.
The correct answer about experiment, trial, and outcome is
a. The experiment identifies whether a head or tail
b. The experiment is flipping the coin
d. A trial is one flip of the coin
Experiment:
An experiment in probability is a process or activity that involves observing or measuring an outcome or event, in order to determine the likelihood or probability of certain outcomes.
Outcome:In probability, an outcome refers to a possible result that can occur from an experiment or event. It is one of the possible outcomes that can happen, and it may be a single result or a set of results.
TrialIn probability, a trial is a single repetition of an experiment or event. It is the process of observing or measuring the outcome of an event or experiment once.
Here we have
At a sports event, a fair coin is flipped to determine which team has possession of the ball.
The coin has two sides, heads, (H), and tails, (T).
From the given options correct answers are
a. The experiment identifying whether a head or tail is flipped is correct because the experiment is to determine which side of the coin will be facing up after the coin is flipped, either heads (H) or tails (T).
b. The experiment is flipping the coin is correct because the experiment involves physically flipping the coin.
d. A trial is one flip of the coin is correct as a trial is defined as a single performance of an experiment, in this case, flipping the coin once.
Therefore,
The correct answer about experiment, trial, and outcome is
a. The experiment identifies whether a head or tail
b. The experiment is flipping the coin
d. A trial is one flip of the coin
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Property damage liability pays for injuries to a driver or their passengers caused by an uninsured or underinsured driver. True or false
The statement that the Property damage liability pays for injuries to a driver or their passengers caused by an uninsured or underinsured driver is false.
What is Auto Insurance Policy?Auto insurance policy is a contract between the insurance company and the person being insured which protects the person under any financial loss caused by accident or theft.
There are mainly six types of auto insurance coverage that the company basically provide.
They are Property damage liability, Bodily injury liability, PIP, Uninsured and underinsured motorist coverage, collision and comprehensive.
Property damage liability pays for the damage that the person insured causes to someone else's property, which include someone else's car, buildings or so.
The given coverage in the statement is the Uninsured and underinsured motorist coverage.
Hence the given statement is false.
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Julia is the oldest of three siblings whose ages are consecutive integers. If the sum of their ages is 4242, find julia's age.
The age of Julia is 13 years.
Integers are whole numbers, including both positive and negative numbers, that do not have any fractions or decimals. In mathematics, integers are often used to represent real-world quantities such as age, time, and money.
In this problem, Julia is the oldest of three siblings whose ages are consecutive integers. We can represent this using the equation x + (x+1) + (x+2) = 42, where x is Julia's age.
To solve this equation, we can use the distributive property to expand the left side of the equation to 3x + 3 = 42.
We can then subtract 3 from both sides of the equation to get 3x = 39. Finally, we can divide both sides by 3 to get x = 13.
Therefore, Julia's age is 13.
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Complete Question:
Julia is the oldest of three siblings whose ages are consecutive integers. If the sum of their ages is 42, find Julia's age.
The specific gravity of a substance is defined as the ratio of its density to the density of water. The density of steel is 487 pounds per cubic foot and the density of water is 62.4 pounds per cubic foot. Calculate the specific gravity of steel.
Answer:
Step-by-step explanation:
hashhshd
Answer:
≈ 7.8
Step-by-step explanation:
Specific gravity of steel = Density of steel / Density of water
Density of steel = 487 pounds per cubic foot
Density of water = 62.4 pounds per cubic foot
Specific gravity of steel = 487 / 62.4
Specific gravity of steel ≈ 7.8
Therefore, the specific gravity of steel is approximately 7.8.
please help me, due toromow!! (ignore the numbers i put)
The Area of Trapezoid of figures given below.
What is Area of Trapezoid?The area of a trapezoid is found using the formula, A = ½ (a + b) h,
where 'a' and 'b' are the bases (parallel sides) and 'h' is the height (the perpendicular distance between the bases) of the trapezoid.
Given:
1. Area of Trapezoid
= 1/2 ( a+ b) x h
= 1/2 (22+ 11) x 12
= 33 x 6
= 198 m²
2. Area of Trapezoid
= 1/2 ( a+ b) x h
= 1/2 (38+ 24) x 26
= 806 mm²
3. Area of Trapezoid
= 1/2 ( a+ b) x h
= 1/2 (105 + 212) x 78
= 12363 Km²
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Name 1. Write equivalent fractions for 2/ 3 and 1/3 that could be used to find the sum of the fractions.
Answer:
4/6 and 2/6
Step-by-step explanation:
2/3 = 4/6
1/3 = 2/6
4/6 + 2/6 = 6/6 = 1
this is an altered version of the assignment cuz my teacher thinks she’s funny, someone solve this
consider the following exponential probability density function. for a. which of the following is the formula for ? 1 2 3 - select your answer - b. find (to 4 decimals). c. find (to 4 decimals). d. find (to 4 decimals). e. find (to 4 decimals).
Therefore, the following exponential probability density function P(4 ≤ x ≤ 6) is 0.1406 (rounded to four decimal places).
What is probability?Probability is a measure of the likelihood or chance of an event occurring. It is a mathematical concept that quantifies the degree of uncertainty of an outcome in a given situation or experiment. Probability is usually expressed as a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain to occur. The probability of an event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
Here,
(a) The formula for P(x ≤ x0) is the cumulative distribution function (CDF), which gives the probability that the random variable x is less than or equal to a certain value x0. For the exponential probability density function given, the CDF is:
F(x) = P(x ≤ x0) = ∫[0,x0] f(x) dx = ∫[0,x0] (1/5)e*(-x/5) dx
(b) To find P(x ≤ 4), we substitute x0 = 4 into the CDF formula and evaluate the integral:
P(x ≤ 4) = F(4) = ∫[0,4] (1/5)e*(-x/5) dx
= [-e*(-x/5)] from x = 0 to 4
= -e*(-4/5) + 1
≈ 0.3297 (rounded to four decimal places)
(c) To find P(x ≥ 5), we note that P(x ≥ 5) = 1 - P(x < 5), where P(x < 5) is the probability that x is less than 5. Using the CDF formula, we have:
P(x < 5) = F(5) = ∫[0,5] (1/5)e*(-x/5) dx
= [-e*(-x/5)] from x = 0 to 5
= -e*(-1) + 1
≈ 0.6321
Therefore, P(x ≥ 5) = 1 - P(x < 5) = 1 - 0.6321 = 0.3679 (rounded to four decimal places).
(d) To find P(x ≤ 6), we use the CDF formula with x0 = 6:
P(x ≤ 6) = F(6) = ∫[0,6] (1/5)e*(-x/5) dx
= [-e*(-x/5)] from x = 0 to 6
= -e*(-6/5) + 1
≈ 0.4703
(e) To find P(4 ≤ x ≤ 6), we note that P(4 ≤ x ≤ 6) = P(x ≤ 6) - P(x < 4), where P(x < 4) is the probability that x is less than 4. Using the CDF formula, we have:
P(x < 4) = F(4) = ∫[0,4] (1/5)e*(-x/5) dx
= [-e*(-x/5)] from x = 0 to 4
= -e*(-4/5) + 1
≈ 0.3297
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Complete question:
Consider the following exponential probability density function. f(x) = 1 5 e−x/5 for x ≥ 0 (a) Write the formula for P(x ≤ x0). (b) Find P(x ≤ 4). (Round your answer to four decimal places.) (c) Find P(x ≥ 5). (Round your answer to four decimal places.) (d) Find P(x ≤ 6). (Round your answer to four decimal places.) (e) Find P(4 ≤ x ≤ 6). (Round your answer to four decimal places.)
In the year 2020, there were 14.02 billion cell phones in use worldwide. In 2022, the number
increased to 15.96 billion worldwide.
a. What is the average rate of change in the number of worldwide cell phones?
b. Using 14.02 as the initial amount, write a linear equation that models the number of
worldwide cell phones. Make sure to define the variables.
C.If the rate stays the same, predict the number of cell phones that will be in use worldwide
in the year 2027.
Answer:
Step-by-step explanation:
a. The average rate of change in the number of worldwide cell phones can be calculated as:
Average rate of change = (change in number of cell phones) / (change in time)
The change in number of cell phones is 15.96 billion - 14.02 billion = 1.94 billion, and the change in time is 2 years. Therefore,
Average rate of change = 1.94 billion / 2 years = 0.97 billion/year
So, the average rate of change in the number of worldwide cell phones is 0.97 billion per year.
b. We can use the point-slope form of a linear equation to model the number of worldwide cell phones. Let t be the time in years since 2020, and C(t) be the number of worldwide cell phones in billions. Then the equation can be written as:
C(t) - 14.02 = 0.97t
Simplifying, we get:
C(t) = 0.97t + 14.02
So, the linear equation that models the number of worldwide cell phones is C(t) = 0.97t + 14.02.
c. To predict the number of cell phones that will be in use worldwide in the year 2027, we need to find the value of C(2027 - 2020) = C(7) using the linear equation we derived in part (b).
C(7) = 0.97(7) + 14.02 = 20.83 billion
Therefore, if the rate stays the same, we can predict that there will be 20.83 billion cell phones in use worldwide in the year 2027.
help solve feasible regions and optimization
The inequalities solution is given below as
(5,8)-44 -25What is the inequalities solution?[tex]8 x-y \leq 32 \\\\&-3 x+5 y \leq 25 \\\\& \Rightarrow {[8 x-y \leq 32] \times 5 } \\\\& {[-3 x+5 y \leq 25] \times 1 } \\\\& \Rightarrow 40 x-5 y \leq 160 \\\\&-3 x+5 y \leq 25 \\\\& 37 x \leq 185 \\\\& x \leq \frac{185}{37} \leq 5[/tex]
substitute $x=5$ into eqn(11)
[tex]-3 x+5 y \leq 25\\\\$-3(5)+5 y \leq 25\\\\& -15+5 y \leq 25 \\\\\& 5 y \leq 25+15 \\\\& 5 y \leq 450 \\\\& y \leq \frac{40}{5} \\\\& -y \leq 8 \\\\[/tex]
(5,8)
z=-4 x+5 y
[tex]& \frac{\partial z}{\partial x}=-4(i)-5 y \\[/tex]
=-4-5 y
when y=8
[tex]\frac{\partial z}{\partial x} & =-4-5(8)[/tex]
=-4-40
=-4-40
=-44
[tex]& \frac{\partial z}{\partial y}=-4 x-5(i) \\[/tex]
when x=5
[tex]\frac{\partial z}{\partial y}=-4 x-5 \\[/tex]
[tex]\frac{\partial z}{\partial y} & =-4(5)-5 \\[/tex]
=-20-5
=-25
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38.8% of Canada's population lives in Ontario. The population of Ontario is 12.9 million. What is the population of Canada?
let the total population be x
Step-by-step explanation:
38.8%of x=12,900,000
x=12,900,000*100/38.8
x=12,900,000*100*10/388
x=33,247,422.680412Determine whether the study depicts an observational study or an experiment. Thirty university students are divided into two groups. One group receives free tutoring in mathematics, the other doesn't. After one semester, scores on final mathematical examinations are compared. Does the description correspond to an observational study or an experiment?
The description corresponds to an experiment.
What is mathematics?Mathematics is the sciences and study of quality, structure, space, and change. Mathematician's are seek out patterns, formulate new conjectured, and establish truth by the rigorous seduction from appropriately choden axioms and definitions.
An experiment is a type of scientific research method in which a researcher manipulates one or more variables and measures the effects of the manipulation on other variables. In this example, the researcher divided the thirty university students into two groups and manipulated one variable (free tutoring in mathematics) to measure the effects on another variable (final mathematical examination scores). Therefore, this is an experiment.
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The area of the triangle below is _____
Answer:
A = 20 ft²
Step-by-step explanation:
the area (A) of a triangle is calculated as
A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the perpendicular height )
here b = 5 and h = 8 , then
A = [tex]\frac{1}{2}[/tex] × 5 × 8 = [tex]\frac{1}{2}[/tex] × 40 = 20 ft²