At 4:00 PM, the distance between Andy and Bill is minimal, about 6.04 miles apart.
Pythagorean theorem is used to find the distance between Andy and Bill at any point in time.
Suppose 3 t hours have passed.
12:00 am.
At that point, Andy moved a remove of 4 miles south from point A, and Charge moved a remove of 5 miles west of point B.
The separation between Andy and Charge is given by
[tex]D(t) = sqrt[(9 - 5t)^2 + (4t)^2][/tex]
To find the time when the distance between Andy and Bill is minimal, we need to find the value of t that minimizes D(t).
To do this, find the derivative of D(t) with respect to t, set it to zero, and solve for t.
dD/dt = (1/2)[2(9 - 5t)(-5) + 2(4t)*(4)]
= -45 + 16t
Setting dD/dt = 0 gives: -45 + 16t = 0
Solving for t gives: t = 45/16 ≈ 2.81 hours
Therefore, the time at which the distance between Andy and Bill is minimal is 3.
48 hours (rounded to the nearest minute).
Note that at this point Andy has traveled a remove of 42.81 = 11.24 miles south of point A, and Charge has traveled a remove of 52.81 = 14.05 miles west of point B.
The separations between them are:
[tex]D(2.81) = sqrt[(9 - 52.81)^2 + (42.81)^2] ≈ 6.04 miles[/tex]
therefore, At 4:00 PM, the distance between Andy and Bill is minimal, about 6.04 miles apart.
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The length of ribbons found at a seamstress are listed.
5, 8, 10, 12, 12, 19
What is the appropriate measure of variability for the data shown, and what is its value?
The range is the best measure of variability and equals 14.
The IQR is the best measure of variability and equals 4.
The mean is the best measure of variability and equals 11.
The median is the best measure of variability and equals 11.
The most appropriate measure of variability which can be used for the data given is IQR and the measure is 4.
Given data set is,
5, 8, 10, 12, 12, 19
Mean and median are the measures of central tendency and not variability.
So they are not appropriate.
Remaining options are Range and IQR.
Range is the difference of the maximum value and the minimum value.
Here, range = 19 - 5 = 14
But range will be affected by the outliers and is not an appropriate measure of variability.
Remaining is IQR, which is the measure of the spread of middle 50% of the data.
IQR = Third quartile - First quartile.
Third quartile = 12 and the first quartile = 8
IQR = 12 - 8 = 4
Hence the appropriate measure is IQR.
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I NEED HELP ON THIS ASAP!!!
1. The numeric values of the function are given as follows:
x = -4, y = 1/16.x = -3, y = 1/8.x = -2, y = 1/4.x = -1, y = 1/2.x = 0, y = 1.2. As x approaches negative infinity, y approaches zero.
How to calculate the numeric value of a function or of an expression?To calculate the numeric value of a function or of an expression, we substitute each instance of any variable or unknown on the function by the value at which we want to find the numeric value of the function or of the expression presented in the context of a problem.
The numeric values for this problem are given as follows:
x = -4, y = 1/16, as 2^(-4) = 1/2^4 = 1/16.x = -3, y = 1/8, as 2^(-3) = 1/2^3 = 1/18.x = -2, y = 1/4, as 2^(-2) = 1/2^2 = 1/4.x = -1, y = 1/2, as 2^(-1) = 1/2^1 = 1/2.x = 0, y = 1, as 2^(0) = 1/2^0 = 1.Increasing the negative exponent, the number gets closer to zero.
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5. Find the perimeter and area
*Triangle- based prism*
Step-by-step explanation:
for the perimeter you have to say two brackets live plus height plus with plastic
How many miles go into 10,000 kilometers
Answer:
Step-by-step explanation:
6213.712
Answer:
10,000 Kilometers = 6,213.7119 Miles
Step-by-step explanation:
Como se resuelve esto
2x²-11x=-14
Mediante factorizacion
The solutions to the equation are x = 7/2 or x = 2. This is because if either of the factors (2x - 7) or (x - 2) equals zero, then the whole expression will equal zero.
To solve the quadratic equation 2x²-11x=-14 by factorization, we need to rearrange the equation to bring all terms to one side so that it is in the form ax² + bx + c = 0.
First, we add 14 to both sides of the equation, which gives us:
2x² - 11x + 14 = 0
To factorize this quadratic equation, we need to find two numbers that multiply to give the constant term (14) and add to give the coefficient of the middle term (-11). In this case, the two numbers are -2 and -7, as (-2) x (-7) = 14 and (-2) + (-7) = -9.
Using these two numbers, we can rewrite the middle term as -2x - 7x, which gives us:
2x² - 2x - 7x + 14 = 0
We can then factorize the first two terms and the last two terms separately, which gives us:
2x(x - 1) - 7(x - 2) = 0
We can then use the distributive property to simplify the equation:
2x² - 2x - 7x + 14 = 0
2x(x - 1) - 7(x - 2) = 0
(2x - 7)(x - 2) = 0
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please i need your help for today please i would really appreciate it
Answer:
increasing: x > 0
Step-by-step explanation:
Given a table of function values, you want to know the interval on which the function is increasing.
IncreasingA function is increasing if f(x)-values get larger when x-values get larger. As we go down the table, the x-values get larger.
In the first three lines of the table, the f(x)-values are getting smaller. The function is decreasing on that interval, x < 0.
In the last three lines of the table, the f(x) values are getting larger. The function is increasing on that interval, x > 0.
__
Additional comment
The point (0, 0) represents a minimum. The function is not increasing or decreasing at that point, so the interval of interest is x > 0, not x ≥ 0.
Given the polynomial 4x2y4 − 9x2y6, rewrite as a product of polynomials. a. (2xy2 − 3xy3)(2xy2 + 3xy3) b. (2xy2 − 3xy3)(2xy2 − 3xy3) c. (4xy2 + 9xy3)(xy2 − xy3) d. (4xy2 − 9xy3)(xy2 − xy3)
Given the polynomial 4x2y4 − 9x2y6, rewrite as a product of polynomials. (2xy2 − 3xy3)(2xy2 + 3xy3). So, correct answer is A.
To multiply two binomials, we use the FOIL method which stands for First, Outer, Inner, Last. For option A, using the FOIL method, we get
(2xy² - 3xy³)(2xy² + 3xy³) = (2xy²)² - (3xy³)² = 4x²y⁴ - 9x²y⁶
This is the given polynomial, so option A is correct.
For other option, we have two identical binomials multiplied together, which would give us a trinomial with three terms, so it cannot be a product of two binomials.
Option C is also incorrect because when we multiply the two binomials, we do not get the given polynomial. Option D is incorrect as well because the signs are incorrect and we would get a different polynomial when we multiply the two binomials.
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--The given question is incomplete, the complete question is given
" Given the polynomial 4x²y⁴ − 9x²y⁶, rewrite as a product of polynomials. a. (2xy² − 3xy³)(2xy² + 3xy³) b. (2xy² − 3xy³)(2xy² − 3xy³) c. (4xy² + 9xy³)(xy² − xy³) d. (4xy² − 9xy³)(xy² − xy³)"--
Need some serious help with this one
Answer:
FH = 26
Step-by-step explanatio
I only know the answer
Answer:
FH ≈ 11.62
Step-by-step explanation:
using the Altitude- on- Hypotenuse theorem , then
FH² = EH × GH = 9 × 15 = 135 ( take square root of both sides )
FH = [tex]\sqrt{135}[/tex] ≈ 11.62 ( to the nearest hundredth )
PLEASE HELP WITH EXPLANATION AND ANSWER ASAP
The graph of the solution would be a number line with an open circle at 48 and an arrow extending to the right, indicating all values greater than 48 are solutions to the inequality. The solution would be (48, ∞).
What justifies inequality?The idea of inequality, which is the state of not being equal, especially in terms of status, rights, and opportunities1, is at the core of social justice theories. However, because it frequently has diverse meanings to different people, it is prone to misunderstanding in public discourse.
Part A:
We can solve the inequality as follows:
1/4x - 3 - 5 > 4
1/4x - 8 > 4
1/4x > 12
x > 48
Therefore, the solution to the inequality is x > 48.
Part B:
Since the inequality is stringent, the graph of the solution would be a number line with an open circle at 48 and an arrow pointing to the right, signifying that all numbers greater than 48 are solutions to the inequality. The answer would be (48, ) in interval notation.
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what is 100000^3? my caculater wont tell me!
Answer:
1e+15 or 1.000.000.000.000.000
Step-by-step explanation:
what is 100000^3? my caculater wont tell me!
100000³ = 100000 × 100000 × 100000
100000 × 100000 × 100000 =
10000000000 × 100000 =
1e+15 or 1.000.000.000.000.000
What if the dimension of the original rectangle in Exercise 1 had been multipled by 1/2? How would the area have been affected
If the dimensions of a rectangle are multiplied by 1/2, its area will be multiplied by 1/4, which means the new area will be one-fourth of the original area.
What is the area of the rectangle?To find the area of a rectangle, we multiply the length of the rectangle by the width of the rectangle.
According to the given information:The area of a rectangle is calculated by multiplying its length and width. If the dimensions of a rectangle are multiplied by a factor of k, then the new area of the rectangle is equal to k times the original area.
In this case, the dimensions of the original rectangle are multiplied by 1/2, which means that the new length and width of the rectangle are 1/2 times the original length and width. Therefore, the new area of the rectangle is equal to (1/2) times the original length multiplied by (1/2) times the original width. This can be simplified to 1/4 times the original area. Therefore, the area of the new rectangle is one-fourth of the area of the original rectangle.
Therefore, If the dimensions of a rectangle are multiplied by 1/2, its area will be multiplied by 1/4, which means the new area will be one-fourth of the original area.
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wo random samples of earnings of professional golfers were selected. one sample was taken from the professional golfers association, and the other was taken from the ladies professional golfers association. at , is there a difference in the means? the data are in thousands of dollars. use the critical value method with tables. pga lpga
in general, to perform a hypothesis test comparing the means of two independent samples using the critical value method, you would follow these steps:
State the null and alternative hypotheses. For example, the null hypothesis could be that there is no difference in means between the two populations (i.e., H0: µ1 - µ2 = 0), and the alternative hypothesis could be that there is a significant difference in means (i.e., Ha: µ1 - µ2 ≠ 0).
Determine the level of significance, α, which represents the probability of rejecting the null hypothesis when it is actually true. For example, if α = 0.05, then there is a 5% chance of making a Type I error (rejecting the null hypothesis when it is true).
Calculate the test statistic. The most common test statistic for comparing the means of two independent samples is the t-test. The formula for the t-test is:
t = (x1 - x2) / [s^2pooled/n1 + s^2pooled/n2]^0.5
where x1 and x2 are the sample means, s^2pooled is the pooled variance (calculated using the two sample variances and sample sizes), and n1 and n2 are the sample sizes.
Determine the critical value(s) from the t-distribution table based on the degrees of freedom (df) and level of significance (α). The degrees of freedom for a two-sample t-test is calculated as:
df = n1 + n2 - 2
Compare the test statistic to the critical value(s). If the absolute value of the test statistic is greater than the critical value(s), then reject the null hypothesis; otherwise, fail to reject the null hypothesis.
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PLEASE HELP I'LL GIVE THE BRAINLIEST!
Answer:
Box A: 2 × 4.5 × 6 = 54 cubic inches
Box B: 6 × 2.5 × 3 = 45 cubic inches
Box C: 5 × 4.5 × 2.25 =
50.625 cubic inches
Box D: 2.5 × 2.25 × 3 = 16.875 cubic inches
From least to greatest, the order of the boxes' volumes is D, B, C, A.
Sam started the week with a balance of -$10 in his checking account. Then he deposited some money into the account. The ending balance was $70. How much did sam deposit?
Answer:
Sam balance was -10 and the ending balance was $70
=80+(-10)
=$70
What is the area of a right triangle with a height of ten and one-half feet and a base of 33 feet?
twenty-one and three-fourths ft2
forty-three and one-half ft2
one hundred seventy-three and one-fourth ft2
three hundred forty-six and one-half ft2
The area of the right triangle is 173.25 square feet.
What is the area of the right triangle?The formula for the area of a right triangle is:
A = (1/2)bh
where A is the area, b is the base, and h is the height.
We are given that the height of the right triangle is ten and one-half feet (10.5 ft) and the base is 33 feet.
Substituting the given values into the formula, we get:
A = (1/2)(33)(10.5)
Simplifying the expression on the right side, we get:
A = 173.25
Therefore, the area of the right triangle is 173.25 square feet.
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Help on both problems pls
Answer:
DE = √21
x = 10
Step-by-step explanation:
4)
AC is bisected by BX
AC/2 = 8/2 = 4 = AB
BX² + AB² = AX²
3² + 4² = AX²
AX = 5 = radius of the circle
DE² = DX² - EX²
DE² = 5² - 2² = 25 - 4 = 21
DE = √21
6)
x² = (11-5)² + 8² = 36 + 64 = 100
x = √100 = 10
x = 10
can someone help me pls!!!! Imma give u brainliest
Answer:
sin0= 9/15
cos0= 12/15
tan0 = 9/12
Question 4 of 10
Does this table represent a function? Why or why not?
X
2
3
4
5
5
y
1
4
4
2
5
OA. Yes, because there is the same number of x-values as y-values.
OB. Yes, because every x-value corresponds to exactly one y-value.
C. No, because one x-value corresponds to two different y-values.
OD. No, because two of the y-values are the same.
Does this table represent a function: C. No, because one x-value corresponds to two different y-values.
What is a function?In Mathematics and Geometry, a function can be defined as a mathematical equation which is typically used for defining and representing the relationship that exists between two or more variables such as an ordered pair.
This ultimately implies that, all functions are used in mathematics to uniquely map an input variable (domain or independent values) to an output variable (range or dependent values).
Based on the table shown above, we can reasonably infer and logically deduce that it does not represent a function because the input values (domain or independent values) are not uniquely mapped to the output values (range or dependent values);
3 → 4
4 → 4
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11. Phyllis ran in a 5-kilometer race to help raise money for the school. How many meters long is the race?
Answer:5000 meters
Step-by-step explanation:1km=1000m
A salesman and 30% commission on all merchandise that he sells last month. He sold $700 worth of merchandise how much commission in dollars did he earn last month
1. discuss the internal validity of the regressions that you used to answer empirical exercise 8.2(l). include a discussion of possible omitted variable bias, misspecification of the functional form of the regression, errors in variables, sample selection, simultaneous causality, and inconsistency of the ols standard errors.
Answer: Empirical Exercise 8.2(l) involves running a regression to estimate the relationship between two variables of interest. In evaluating the internal validity of the regression used to answer this exercise, we need to consider several potential sources of bias and other issues that could affect the accuracy of the estimated relationship.
Omitted variable bias: This occurs when a relevant variable is left out of the regression model. If this happens, the estimated coefficients may be biased and inconsistent. For example, if we are estimating the effect of education on earnings but fail to include information about work experience, the coefficient on education may be biased upwards.
Misspecification of the functional form of the regression: If the relationship between the dependent variable and the independent variable(s) is nonlinear, we may need to use a different functional form of the regression equation to obtain accurate estimates. If we fail to do so, the estimated coefficients may be biased and inconsistent.
Errors in variables: When measurement errors occur in the independent variable(s), this can cause the estimated coefficients to be biased and inconsistent.
Sample selection: If the sample used to estimate the regression equation is not representative of the population of interest, then the estimated coefficients may be biased and inconsistent.
Simultaneous causality: When there is a two-way causal relationship between the dependent variable and the independent variable(s), it may not be possible to determine the direction of causality from the regression coefficients.
Inconsistency of the OLS standard errors: If there is heteroskedasticity or autocorrelation in the data, then the ordinary least squares (OLS) standard errors may be inconsistent. This can lead to incorrect conclusions about the statistical significance of the estimated coefficients.
To address these issues, researchers should take care to select an appropriate sample, use a suitable functional form of the regression equation, and account for any relevant variables that could be omitted or measured with errors. It may also be necessary to use alternative statistical techniques to account for simultaneous causality or heteroskedasticity in the data. Finally, researchers should always test the robustness of their results to different model specifications and sensitivity to potential sources of bias.
Step-by-step explanation:
50 POINTS PLEASE HELP
A number line going from negative 2 to positive 1. What is the correct order of the fractions from least to greatest? Point A: −11 3 Point B: −2 3 Point C: 1 3 Point D: −12 3 The correct order for the fractions is .
Answer:
D, A, B, C
Step-by-step explanation:
-12/3, or -4, is lowest
-11/3, or -3.6, is 0.3 more, therefore closer to 0.
-2/3, or -0.6, is much closer to 0, precisely 3 units closer.
1/3, or 0.3, is the only positive number, so it is the most amount.
The vertices of a figure are given. Rotate the figure as described. Find the coordinates of the image.
E(−4, 1), F(−3, 3), G(−2, 3), H(−1, 1)
180°
about the origin
7z + 7> - 2z -4 solve the following for inequality for z simplest form
Answer:
z > - [tex]\frac{11}{9}[/tex]
Step-by-step explanation:
7z + 7 > - 2z - 4
9z + 7 > - 4
9z > -11
z > - [tex]\frac{11}{9}[/tex]
Answer: Just turn it into an equation! Replace the > with a =.
Step-by-step explanation:
Subtract 7 from both sides (bc you’re doing the opposite of +7) So 7z +7-7 cancels out so you just have 7z. 7z = -2z -4 -7, so 7z = -2z -11
Add 2z to both sides (bc your doing the opposite again) to get 9z = -11
Divide both sides by the number of the of the term with both a number and variable, in this case 9z, the number is 9. So 9z/9= -11/9 so simplified, z= -11/9
Final answer = -11/9
Hope this helps :D
A sign on the roadway at the top of a mountain indicates that for the next 4 miles the grade is 9.5° (see figure). Find the change in elevation for a car descending the 4-mile stretch. (Round your answer to two decimal places.)
Step-by-step explanation:
We can use trigonometry to solve this problem. The grade of the road is given as an angle of 9.5°. This means that for every 1 unit of horizontal distance traveled, the elevation changes by the tangent of 9.5°.
We want to find the change in elevation for a car descending the 4-mile stretch. To do this, we can multiply the length of the road by the tangent of the grade angle:
Change in elevation = 4 miles x tan(9.5°)
Using a calculator, we can find that tan(9.5°) = 0.1664. Substituting this value into the equation, we get:
Change in elevation = 4 miles x 0.1664 ≈ 0.67 milesTo convert this to feet, we can multiply by the number of feet in a mile:
Change in elevation = 0.67 miles x 5,280 feet/mile ≈ 3,539 feetTherefore, the change in elevation for a car descending the 4-mile stretch is approximately 3,539 feet.
3) Which experience uses social and professional connections to learn more about jobs from others?
Question 3 options:
informational interview
job shadowing
internship
networking
Networking is the experience that uses social and professional connections to learn more about jobs from others. So, correct option is D.
It involves building and maintaining relationships with individuals who can offer information, advice, or support related to one's career goals. Networking can be done in various settings such as professional organizations, conferences, social events, and online platforms.
It can also involve exchanging information, sharing experiences, and providing referrals or recommendations. By networking, individuals can learn about job opportunities, industry trends, and insights into different career paths.
Additionally, networking can lead to mentorship and collaboration, which can help individuals develop their skills and expand their professional network further. Networking is an essential aspect of career development, as it can help individuals gain exposure and access to new opportunities that can lead to career advancement.
So, correct option is D.
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I just need the perimeter
Example #2 - Coordinate Perimeter/Area Calculate the area and perimeter of the shape shown. Determine the: Perimeter Area
Using composite figures, we can find that the area of the shape is 18unit² and the perimeter of the shape is 20 + √8 units.
Define composite figures?A composite shape is a shape that is made by connecting a few polygons to form a different shape. These shapes or figures can be formed from a variety of shapes, including triangles, squares, quadrilaterals, etc. Divide a composite item into basic forms such a square, triangle, rectangle, or hexagon to get its area.
In essence, a composite shape is a combination of fundamental shapes. It goes by the name's "composite" or "complex" shapes.
In this composite figure,
We have 2 rectangles and a triangle.
Dimension of rectangle:
Base = 2units
Height = 2 units.
Hypotenuse = √ (2² + 2²)
= √8
Area of the triangle = 1/2 × b × h
= 1/2 × 2 × 2
= 2unit².
Now, the rectangles are equal in shape and size.
Dimensions are:
Length = 4 units
Breadth = 2 units.
Area = l × b
= 4 × 2
= 8unit².
We have 2 rectangles so total area = 2 × 8
= 16unit².
Total area of the shape = area of triangle + area of 2 rectangles
= 2 + 16
= 18unit²
Now coming to the perimeter of the shape, we have to find the sum of the measure of the sides of the shape:
So, we have
2 + 4 + 2 + 6 + 6 + √8
= 20 + √8 units.
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What is the area of this figure? 10 mi 17 mi 3 mi 4 mi 4 mi 6 mi 4 mi 18 mi
The area of the figure is 197 square miles
How to find the area of the figure.To find the area of the figure, we need to first identify the shape of the figure. From the given dimensions, it appears to be an irregular quadrilateral with a triangle on top.
We can divide the figure into two parts: a rectangle with dimensions 17 mi by 10 mi, and a triangle with base 18 mi and height 3 mi.
The area of the rectangle is:
Area of rectangle = length x width = 17 mi x 10 mi = 170 mi^2
The area of the triangle is:
Area of triangle = (base x height) / 2 = (18 mi x 3 mi) / 2 = 27 mi^2
Therefore, the total area of the figure is the sum of the areas of the rectangle and triangle:
Total area = 170 mi^2 + 27 mi^2 = 197 mi^2
So the area of the figure is 197 square miles.
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in a city of 100,000 voters, 40% are democrat, 30% republican, 20% green, and 10% undecided. a sample of 1000 people is selected. (a) what is the expectation and variance for the number of greens in the sample?
The variance of the number of green voters in the sample is 160.
What is variance?
In statistics, variance is a measure of the spread or variability of a set of data. It measures how much the values in a dataset differ from the mean or average value. Specifically, variance is the average of the squared differences from the mean.
We can use the binomial distribution to model the number of green voters in the sample, where the probability of success (voter being green) is p = 0.2 and the number of trials (voters in the sample) is n = 1000.
The expectation or mean of the number of green voters in the sample is given by the formula:
E(X) = np
where X is the random variable representing the number of green voters in the sample. Substituting the values, we get:
E(X) = 1000 * 0.2 = 200
So we expect to see about 200 green voters in the sample.
The variance of the number of green voters in the sample is given by the formula:
Var(X) = np(1 - p)
Substituting the values, we get:
Var(X) = 1000 * 0.2 * (1 - 0.2) = 160
So the variance of the number of green voters in the sample is 160.
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