Answer:
Step-by-step explanation:
In the equation h=6d, the independent variable is d, which represents the number of days. The dependent variable is h, which represents the height of the plant that depends on the number of days it has been growing.
what is the solution to the inequality -0.4x1.27>0.8
Answer:
x < 1.175
Step-by-step explanation:
-0.4x + 1.27 > 0.8
-0.4x > -0.47
x < 1.175
Identify the unit rate shown in the graph. A graph is shown.
A. $7 per hour B. $9 per hour C. 7 hours per $1 D. 9 hours per $1
Answer:
A
Step-by-step explanation:
it cant be 9 per hour cuz it is a smaller amount and A is the only one that makes sens
A number "z" when rounded to the nearest whole, is equal to
Find the upper and lower bound of "z"
In order to find the upper and lower bounds of a rounded number:
Identify the place value of the degree of accuracy stated.Divide this place value by 2 .Add this amount to the given value to find the upper bound, subtract this amount from the given value to find the lower bound.How to explain the boundThe upper and lower bounds can be found by dividing the degrees of accuracy by 2 and then subtracting and adding with the value to give the lower and upper bounds respectively.
Kindly check the above explanation inorder to know how to calculate the value as your information is incomplete
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How does one find the upper and lower bound of a variable
Help please
I don't know ️
Please help me
Answer:
3×4-8=b
Step-by-step explanation:
The total number of batteries fatima has is :
3×4= 12
She has 12 batteries but she gave her brother 8
12-8=4
And batteries represent b
So the equation is
3×4-8=b
f(x)= lx+3l-7
What will the function be if it has been:
1. Reflected across the x-axis
2. Translated left 4 units
3. Translated down 3 units
Please type answer with no spaces. The absolute value key should be located directly above the "Enter/Return" key on your keyboard.
The function after each transformation is given as follows:
1. Reflected across the x-axis: f(x) = -|x + 3| + 7.
2. Translated left 4 units: f(x) = |x + 7| - 7.
3. Translated down 3 units: f(x) = |x + 3| - 10
How to define the functions?The function for this problem is defined as follows:
f(x) = |x + 3| - 7.
When the function is reflected across the x-axis, we have that the entire function is multiplied by -1, hence:
f(x) = -(|x + 3| - 7)
f(x) = -|x + 3| + 7.
When the function is translated left 4 units, we have that x -> x + 4, hence:
f(x) = |x + 4 + 3| - 7
f(x) = |x + 7| - 7.
When the function is translated down 3 units, we have that f(x) -> f(x) - 3, hence:
f(x) = |x + 3| - 7 - 3
f(x) = |x + 3| - 10
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Bri opened up a savings account that earns 1.25% interest, compounded monthly. If she puts $2500 in the account to start, how much money would be in her account 4 years later, assuming no additional money was deposited or withdrawn from the account? Group of answer choices $2377.32 $2620.36 $2628.11 $2510.43
Answer:
The formula for calculating the future value of an investment with compound interest is:
A = P(1 + r/n)^(nt)
where A is the future value, P is the principal (initial amount), r is the annual interest rate (as a decimal), n is the number of times the interest is compounded per year, and t is the time period in years.
In this case, P = $2500, r = 0.0125 (1.25% as a decimal), n = 12 (since the interest is compounded monthly), and t = 4.
Plugging these values into the formula, we get:
A = 2500(1 + 0.0125/12)^(12*4) ≈ $2,628.11
Therefore, the answer is $2628.11.
Answer: $ 2628.11
Step-by-step explanation:
Compound interest is nasty.
the formula (which you need to memorize) is:
[tex]A = P(1+\frac{r}{n} )^t^n[/tex]
A is the final amount, P is the principle, (original amount of money invested), r is the rate of return (as a decimal NOT percent), n is the number of times compounded annually, and t is the time, (in years), invested.
With all this information, our formula becomes:
[tex]A = 2500(1+\frac{0.0125}{12} )^4^8[/tex]
solving, we get A ≅ 2628.11
This corresponds to answer choice C
3. Find volume. Show work, round to 2 decimal places.
*square based pyramid*
the first thing that you're supposed to do is multiply all the given measurements as we know that volume is equal to length times with times height so you have to multiply all the three given measurements the answer that you get after multiplying those three given measurements you have to round your answer to the nearest two decimal places therefore after they'll call my they need to be two numbers just after the coma
Fill in the blanks. 8 x 12 = 8 x (10 + ?) = (8 x 10) + (8 x ?) = 80 + ? = ?
(i need help on the question marks)
PLEASE HELP FASTTT LIKW IN LESS THAN 30 MINUTES PLSS IM GIVING BRAINLIEST
Answer:
Each student will have passed 17 tests; It will take 3 weeks.
Step-by-step explanation:
The explanation is in the picture.
The Toy Train Collectors' Club used the ages of its membership to construct the histogram. Which age group has the greatest number of members? How many members are in that age group?
The Toy Train Collectors' Club has 140 members who are 42 years of age or younger.
To find the number of members who are 42 years of age or younger, we need to look at the bars in the histogram that represent these age groups. Specifically, we need to add up the heights of the bars that represent members aged 0-42 years old.
The histogram shows that there are 30 members in the age group 0-10,
50 members in the age group 11-20,
40 members in the age group 21-30,
20 members in the age group 31-40, and
15 members in the age group 41-50.
To find the number of members who are 42 years of age or younger, we need to add up the heights of the bars that represent members aged 0-42 years old, which is 30+50+40+20 = 140.
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A random sample of 50 people from a town with a
population of 14,878 were asked to name their
favorite flavor of ice cream. If 7 people in the sample
named chocolate as their favorite ice-cream flavor,
about how many people in the town would be
expected to name chocolate?
A)
350
B) 2,100
C) 7,500
D) 10,500
The closest answer among the given options is B) 2,100.
To estimate the number of people in the town who would name chocolate as their favorite ice-cream flavor, we can use proportions. We know that 7 out of 50 people in the sample named chocolate as their favorite. To find the proportion of chocolate lovers in the sample, we can divide the number of chocolate lovers by the total number of people surveyed:
7 chocolate lovers / 50 people surveyed = 0.14
Now, we can apply this proportion to the total population of the town to estimate the number of chocolate lovers:
0.14 * 14,878 (total population) ≈ 2,082.92
Since we can't have a fraction of a person, we can round this number to the nearest whole number:
Approximately 2,083 people in the town would be expected to name chocolate as their favorite ice-cream flavor.
The closest answer among the given options is B) 2,100.
You paint four walls. Each wall is a rectangle with a length of 20 feet and a height of 12 feet. One gallon of paint covers about 320 square feet. How many gallons of paint do you need in order to cover the walls?Give explanation
Answer:
To find out how many gallons of paint are needed to cover the walls, we need to first find the total area of the walls.
The four walls are rectangles with a length of 20 feet and a height of 12 feet. So, the area of one wall is:
20 feet x 12 feet = 240 square feet
Since there are four walls, the total area of the walls is:
4 x 240 square feet = 960 square feet
We know that one gallon of paint can cover approximately 320 square feet. To find how many gallons of paint are needed, we can divide the total area of the walls by the area covered by one gallon of paint:
960 square feet ÷ 320 square feet per gallon = 3 gallons of paint
Therefore, you need approximately 3 gallons of paint to cover the walls.
What is the error in the solution of the proportion shown at the right?
A. The second line should be 2x + 18 = 3x making the final answer 18 = x
B. The second line should be 2x + 27 = 3x making the final answer 27= x
C. The second line should be 3x + 9 = 2x making the final answer 9 = x
D. There is no error
The error in the proportion is the second line should be 2x + 18 = 3x making the final answer 18 = x
The error in the solution of the proportion shown can be calculated as follows:
Therefore, let's solve the equation to know the error made.
2 / 3 = x / x + 9
cross multiply
2(x + 9) = 3x
open the brackets
2x + 18 = 3x
subtract 2x from both sides of the equation
2x + 18 = 3x
2x - 2x + 18 = 3x - 2x
x = 18
Therefore, he made mistake in the second line, it should be 2x + 18 = 3x making the final answer 18 = x
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The population of a city has been increasing by 2% annually. The sign shown is from the year 2000.
Write an exponential growth function that represents the population t
years after 2000.
y=
.
What will the population be in 2020? Round your answer to the nearest thousand.
The population will be about
.
The exponential growth function for the given initial population of the city is y = 315,000 × (1 + 0.02)ⁿ .
And the population increase in the year 2020 is equal to 468000.
Population in the year 2000 = 315,000
Increase in population growth by 2%
The population is increasing by 2% annually, which means the growth rate is 0.02 per year.
The initial population in the year 2000 is 315,000.
An exponential growth function as follows,
y = a ( 1 + r )ⁿ
Where 'a' represents the initial population of the city.
And 'r' represents the rate of the growth of the population.
y = 315,000 × (1 + 0.02)ⁿ
where n is the number of years after 2000 .
And y is the population at that time.
To find the population in the year 2020,
Substitute n = 20 into the equation to get the population in 2020 and solve for y,
y = 315,000 × (1 + 0.02)²⁰
⇒ y = 315,000 × (1.02)²⁰
⇒ y = 315,000 × 1.4860
y ≈ 468073.4
Rounding to the nearest thousand, the population in 2020 will be about 468000.
Therefore, the exponential growth function is y = 315,000 × (1 + 0.02)ⁿ and the population in 2020 is 468000.
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The above question is incomplete, the complete question is:
The population of a city has been increasing by 2% annually. The sign shown is from the year 2000.
City limit
Brookfield
Population. 315,000
Write an exponential growth function that represents the population t
years after 2000?
y=
What will the population be in 2020? Round your answer to the nearest thousand.
The population will be about
engineers designing the next generation of space shuttles plan to include two fuel pumps - one active, the other in reserve. if the primary pump malfunctions, the second is automatically brought on line. suppose a typical mission is expected to require that fuel be pumped for at most 50 hours. according to the manufacturer?s specifications, pumps are expected to fail once every 100 hours. what are the chances that such a fuel pump system would not remain functioning for the full 50 hours?
The probability that this particular fuel pump system when put into the required condition would not remain functional for the full 50 hours is 0.0199.
Therefore, the probability of a fuel pump failing in a mission can be evaluated using the formula designed for probability of failure in a system with two pumps in series connection
P(failure) = P(pump 1 fails) + P(pump 2 fails) - P(both pumps fail)
Here
P(pump 1 fails) = P(pump 2 fails) = 0.01
P(both pumps fail) = (0.01)² = 0.0001.
Now,
P(failure) = 0.01 + 0.01 - 0.0001 = 0.0199
The probability that this particular fuel pump system when put into the required condition would not remain functional for the full 50 hours is 0.0199.
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Monte owns a bakery. He has four employees, who each earn a different hourly wage.
Which two quantities are needed to determine the total amount of money Monte paid his employees this month?
A. the hourly salary of each employee
B. the number of hours the bakery was open each day
C. the number of hours each employee worked this month
D. the number of customers who visited the bakery this week
E. the total number of hours the employees have worked this year
The two quantities needed to determine the total amount of money Monte paid his employees this month are:
A. the hourly salary of each employee
C. the number of hours each employee worked this month.
How the total salary for the month is determined?With four employees at the Monte Bakery, who earn a different hourly wages, to work out the total salary for the month, Monte needs to multiply the hourly wage of each employee by the total number of hours each worked.
Thus, in this mathematical operation, we first use multiplication and then add each individual employee's total salary to sum the total salary for the month.
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A culture of bacteria in a petri dish has an initial population of 1500 cells and grows at a rate (in cells/day) of N′(t)=200(t+2)−12 Assume t is measured in days.
a) What is the population after 14 days? After 34 days?
b) Find the population N(t) at any time t≥0
The population N(t) at any time t≥0 is given by the function N(t) = 100t^2 + 800t + 1332.
a) To find the population after 14 days, we need to integrate the given rate function from 0 to 14:
N(14) - N(0) = ∫(0 to 14) N'(t) dt
N(14) - 1500 = ∫(0 to 14) [200(t+2) - 12] dt
N(14) - 1500 = [100[tex]t^2[/tex] + 800t - 168] evaluated from t=0 to t=14
N(14) = 1500 + [100(14[tex])^2[/tex] + 800(14) - 168] - [100(0[tex])^2[/tex] + 800(0) - 168]
N(14) = 1500 + 17,512
N(14) = 19,012
So the population after 14 days is 19,012 cells.
To find the population after 34 days, we can use the same method:
N(34) - N(0) = ∫(0 to 34) N'(t) dt
N(34) - 1500 = ∫(0 to 34) [200(t+2) - 12] dt
N(34) - 1500 = [100[tex]t^2[/tex] + 800t - 168] evaluated from t=0 to t=34
N(34) = 1500 + [100(34[tex])^2[/tex]+ 800(34) - 168] - [100(0[tex])^2[/tex] + 800(0) - 168]
N(34) = 1500 + 116,768
N(34) = 118,268
So the population after 34 days is 118,268 cells.
b) To find the population N(t) at any time t≥0, we can integrate the given rate function from 0 to t:
N(t) - N(0) = ∫(0 to t) N'(x) dx
N(t) - 1500 = ∫(0 to t) [200(x+2) - 12] dx
N(t) = 1500 + ∫(0 to t) [200(x+2) - 12] dx
N(t) = 1500 + [100[tex]x^2[/tex] + 800x - 168] evaluated from x=0 to x=t
N(t) = 1500 + 100[tex]t^2[/tex] + 800t - 168
N(t) = 100t^2 + 800t + 1332
So the population N(t) at any time t≥0 is given by the function N(t) = 100[tex]t^2[/tex]+ 800t + 1332.
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a) The population after 14 days is 22,788 cells, and the population after 34 days is 126,056 cells.
b) The population at any time t≥0 is given by the equation N(t) = [tex]100t^2[/tex] + 388t + 1500, where t is measured in days and N(t) is the number of cells in the culture at time t.
a) To find the population after 14 days, we can use the given rate equation to calculate the growth rate at t=14 as follows:
N'(14) = 200(14+2) - 12 = 2808 cells/day
Then we can use the following formula to calculate the population after 14 days:
N(14) = N(0) + ∫N'(t) dt, from t=0 to t=14
N(14) = 1500 + ∫(200(t+2) - 12) dt, from t=0 to t=14
N(14) = 1500 + [tex][100t^2 + 400t - 12t][/tex]from t=0 to t=14
N(14) = 1500 + [tex][100(14)^2 + 400(14) - 12(14)] - [100(0)^2 + 400(0) - 12(0)][/tex]
N(14) = 1500 + 21288
N(14) = 22788 cells
Similarly, to find the population after 34 days, we can use the given rate equation to calculate the growth rate at t=34 as follows:
N'(34) = 200(34+2) - 12 = 6772 cells/day
Then we can use the same formula as above to calculate the population after 34 days:
N(34) = N(0) + ∫N'(t) dt, from t=0 to t=34
N(34) = 1500 + ∫(200(t+2) - 12) dt, from t=0 to t=34
N(34) = [tex]1500 + [100t^2 + 400t - 12t] from t=0 to t=34[/tex]
N(34) =[tex]1500 + [100(34)^2 + 400(34) - 12(34)] - [100(0)^2 + 400(0) - 12(0)][/tex]
N(34) = 1500 + 124556
N(34) = 126056 cells
b) To find the population N(t) at any time t≥0, we can use the same formula as above:
N(t) = N(0) + ∫N'(t) dt, from t=0 to t=t
N(t) = 1500 + ∫(200(t+2) - 12) dt, from t=0 to t=t
N(t) = [tex]1500 + [100t^2 + 400t - 12t][/tex] from t=0 to t=t
N(t) = [tex]1500 + 100t^2 + 388t[/tex]
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Convert the following percents to decimals.
150% =
Answer:
1.5
Step-by-step explanation:
Move the decimal point two places to the left to go from a percentage to a decimal.
if £1=9.60DKK, how much is 55p in DKK. Answer to 2d.p.
Answer:3
Step-by-step explanation:
1+2=3
Which is more, 7,000,001 milligrams or 7 kilograms?
Consider the triangle with vertices (-7, -2), (-2, -5) , and (2, 3). What is the approximate perimeter of the triangle?
The perimeter of the triangle is 23.623 units.
What is perimeter of triangle?
Finding the distance around a triangle entails determining its perimeter. The distance formula can be used to calculate the side lengths if you don't already know all of them. The simplest way to find a triangle's perimeter is to add up all of its sides' lengths.
The distance between two points (x1,y1) and (x2,y2) can be determined using the following formula: √(x₂-x₁)² + (y₂ - y₁)²
Let the given vertices are (-7, -2), (-2, -5) , and (2, 3).
Distance formula for two points is = √(x₂-x₁)² + (y₂ - y₁)²
Using the formula,
AB = √((-2)-(-7))² +((-5)-(-2))²
= √(-2+7)² + (-5+2)²
= √5² + (-3)²
= √25 + 9
= √31
Similarly, BC = √(2 - (-2))² + (3-(-5))²
= √(2+2)² + (3+5)²
= √4² + 8²
= √16+64
= √80
CA = √((-7)-2)² + (-2 + 3)²
= √(-9²) + 1
= √81+1
=√82
Perimeter of triangle = AB + BC + CA
= √31 +√81 +√82
= 5.5677 + 9 + 9.0553
= 23.623
Therefore, the perimeter of the triangle is 23.623 units.
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The length of a rectangle is
double its width and the area of
the rectangle is 288 cm². What is
the perimeter of the rectangle?
The perimeter of the rectangle is 72 cm.
what you mean by perimeter?Perimeter is the total distance around the boundary of a two-dimensional shape. It is the sum of the lengths of all sides or edges of the shape.
The perimeter is usually measured in units such as centimeters (cm), meters (m), feet (ft), or inches (in), depending on the unit of measurement used for the sides or edges.
Let's start by assigning variables to the length and width of the rectangle.
Let x be the width of the rectangle in cm.
Then, the length of the rectangle is double the width, which is 2x cm.
We know that the area of the rectangle is 288 cm², so we can set up an equation:
Area = Length x Width
288 = 2x * x
Simplifying the equation, we get:
288 = 2x²
Dividing both sides by 2, we get:
144 = x²
Taking the square root of both sides, we get:
x = ± 12
Since x cannot be negative (as it represents a length), we take x = 12 cm as the width of the rectangle.
The length of the rectangle is 2x, which is 24 cm.
Now we can find the perimeter of the rectangle, which is given by the formula:
Perimeter = 2(Length + Width)
Substituting the values we found, we get:
Perimeter = 2(24 + 12) = 72 cm
Therefore, the perimeter of the rectangle is 72 cm.
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Please help to hard and I’ll give u 20 points
Answer: 2:4
Step-by-step explanation:
you would use a ---select--- test to determine if sample data provide evidence that hypothesized proportions are not correct for a single categorical value from a single population.
You would use a Chi-square test to determine if sample data provide evidence that hypothesized proportions are not correct for a single categorical value from a single population.
You would use a hypothesis test to determine if sample data provide evidence that hypothesized proportions are not correct for a single categorical value from a single population. This type of hypothesis test is commonly used in statistics to evaluate the significance of differences between observed and expected frequencies.
The test involves selecting a sample from the population of interest, calculating the sample proportions, and comparing them to the hypothesized proportions using statistical methods. If the observed proportions are significantly different from the hypothesized proportions, then there is evidence to suggest that the hypothesized values are not correct.
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You would use a one-sample proportion test to determine if sample data provide evidence that hypothesized proportions are not correct for a single categorical value from a single population.
In this test, we compare the observed proportion (based on the sample data) to a hypothesized proportion (based on the null hypothesis) using a test statistic and a p-value. If the p-value is less than the chosen significance level (e.g., 0.05), we reject the null hypothesis and conclude that the observed proportion is significantly different from the hypothesized proportion.
This test is often used in quality control, market research, and public opinion polling to test whether a particular proportion (such as the proportion of defective products or the proportion of people who support a particular policy) is consistent with a hypothesized value.
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Serena is making a model of one of the Egyptian pyramids. The square base has sides that are all 4. 8 in. Each of the triangular faces has a base of 4. 8 in and a height of 4. 2 in. How much paper would it take to cover the entire pyramid?
To cover the entire area of pyramid, Serena would need approximately 63.36 square inches of paper.
The area of the square base is
4.8 in x 4.8 in = 23.04 sq in
The area of each triangular face is
(1/2) x base x height = (1/2) x 4.8 in x 4.2 in = 10.08 sq in
Since there are four triangular faces, the total area of the triangular faces is
4 x 10.08 sq in = 40.32 sq in
Therefore, the total surface area of the pyramid is
23.04 sq in + 40.32 sq in = 63.36 sq in
So, it would take 63.36 square inches of paper to cover the entire pyramid.
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Which of the following points is shown in the graph below?
A.(-1,5,3)
B.(1,-5,3)
C.(1,5,3)
D.(1,5,-3)
Answer:
b
Step-by-step explanation:
if we know that t.05= 1.812 when df = 10, then it is correct to say
Knowing that t.05 = 1.812 when df = 10 helps us to determine the critical value of t for hypothesis testing in this scenario.
If we know that t.05 = 1.812 when df = 10, then it is correct to say that the critical value of t at the 5% significance level for a two-tailed test with 10 degrees of freedom is 1.812.
The t-distribution is a family of probability distributions that depend on the sample size and the degrees of freedom (df). The degrees of freedom represent the number of independent observations available to estimate the population parameters. In this case, when df = 10, the t-distribution has thicker tails compared to the standard normal distribution.
The value t.05 represents the critical value of t at the 5% significance level (or alpha level) in a two-tailed test. This means that if the calculated t-value falls outside the range of -t.05 to +t.05, then the null hypothesis can be rejected.
Therefore, knowing that t.05 = 1.812 when df = 10 helps us to determine the critical value of t for hypothesis testing in this scenario.
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This means that for a t-distribution with 10 df, 95% of the data lies within ±1.812 standard deviations from the mean.
If we know that t.05= 1.812 when df = 10,
then it is correct to say that the probability of obtaining a t-value greater than
1.812 or less than -1.812 is 0.05,
assuming a two-tailed test and a significance level of 0.05.
This means that if we calculate the t-value for a sample with 10 degrees of freedom and the calculated t-value falls
outside the range of -1.812 to 1.812,
we can reject the null hypothesis at the 0.05 significance level.
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Mrs. Dundee wants to sell the rights to her new Cajun cookbook, and she has two offers. The first publisher has offered to pay $80,000 up front and a $3 royalty for every book sold. The second publisher has offered to pay $30,000 up front and $5 for every book sold. Over what range of sales will Mrs. Dundee make more from the second publisher than from the first?
Mrs. Dundee will make more from the second publisher than from the first if she sells more than $25,000 worth of books.
What is the rate?In mathematics, rate is a measure of the change in one quantity with respect to another quantity. It is typically expressed as a ratio between the two quantities.
According to the given information:Let's represent the number of books sold as "x". Then, the total amount of money that Mrs. Dundee will make from the first publisher is:
Total from first publisher = $80,000 + ($3 x x) = $3x + $80,000
Similarly, the total amount of money that she will make from the second publisher is:
Total from second publisher = $30,000 + ($5 x x) = $5x + $30,000
We want to find the range of values of x for which the total amount from the second publisher is greater than the total amount from the first publisher. In other words, we want to find the range of values of x for which,
$5x + $30,000 > $3x + $80,000
Simplifying this inequality, we get:
$2x > $50,000
x > $25,000
Therefore, Mrs. Dundee will make more from the second publisher than from the first if she sells more than $25,000 worth of books.
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WHAT IS THE RANGE OF THIS PIECEWISE FUNCTION?
The given piecewise function has a range of:
Range = {46, 48, 50, 52, 54, 56}.
What is range of a function?The range of a function is the set of all possible output values, or the set of all y-coordinates that correspond to the x-coordinates in the domain of the function.
It is, in other words, the entire set of values that the function is capable of returning as its result.
From the given piecewise function, we can see that the y-coordinates of the function are limited to the values 46, 48, 50, 52, 54, and 56.
These values correspond to the y-intercepts of each of the line segments in the graph.
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A farmer is planning to create a new grazing field for
his horses. He determines that he needs 280 yards of fencing
for his new field. The fencing is sold by the foot. How many
feet of fencing should the farmer buy? Explain.
Answer:
840 feet
Step-by-step explanation:
1 yard = 3 feet
280 yards = x
x = 280 × 3
x = 840 feet