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3 years ago

Can someone help me with this please?

Mathematics

1 answer:

AfilCa [17]3 years ago

8 0

Answer:

Step-by-step explanation:

14 = Minimum

22 = Lower quartile

32 = Median

87 = Upper quartile

95 = Maximum

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A bus travels 12 miles in 20 minutes at this rate how many miles does the bus travel in 60 minutes

Dovator [93]

Answer:

If I'm answering this right, the bus should have travel 36 miles in 60 minutes.

If it takes 20 minutes to get to 12 miles then for every twenty minutes you would just add 12 miles.

3 0

4 years ago

Risa loaned Abi $50 for a month. She charged 5% weekly simple interest for the month. How much did Abi have to pay Risa?

Andru [333]

P = 50
r = 5% or 0.05
t = 1/12
Formula = p(1+rt)
= 50(1+(0.05)(1/12)
= 50(1.0004166667)
= 50.21

For the month, abi has to pay risa $50.21

7 0

2 years ago

The fastest a human has ever run is 27 miles per hour. How many miles per minute did the human tu

malfutka [58]

We have, 1 hour = 60 minutes Given, 27 miles per hour = \frac{27~miles}{1 ~hour} = \frac{27~miles}{60~minutes} because 1 hour = 60 minutes = \frac{0.45~miles}{1 ~minute} So, the human ran at a speed of 0.45 miles per minute

5 0

3 years ago

The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for th

laiz [17]

Answer:

Correct option: (C) 91.

Step-by-step explanation:

To predict the score received by a student if the number of hours studied is 7 can be done using a regression line.

The general form of a regression line is:

$y=\alpha +\beta x$

Here,

Y = dependent variable

X = independent variable

α = intercept

β = slope

The formula to compute the slope and intercept are:

$\alpha =\frac{\sum Y.\sum X^{2}-\sum X\sum XY}{n.\sum X^{2}-(\sum X)^{2}}$

$\beta=\frac{n.\sum XY-\sum X\sum Y}{n.\sum X^{2}-(\sum X)^{2}}$

Consider the table below.

Compute the value of α as follows:

$\alpha =\frac{\sum Y.\sum X^{2}-\sum X\sum XY}{n.\sum X^{2}-(\sum X)^{2}}=\frac{(773\times 208)-(42\times 3406)}{(10\times 208)-(42)^{2}}=56.114$

Compute the value of β as follows:

$\beta=\frac{n.\sum XY-\sum X\sum Y}{n.\sum X^{2}-(\sum X)^{2}}=\frac{(10\times 3406)-(42\times 773)}{(10\times 208)-(42)^{2}}=5.044$

The regression equation is:

$y=56.114+5.044\ x$

For x = 7 compute the value of y as follows:

$y=56.114+5.004\ x\\=56.114+(5.044\times 7)\\=91.422\\\approx 91$

Thus, the score received by a student who studied 7 hours is 91.

The correct option is (C).

4 0

4 years ago

If f(x) = (2x² + 5), then f'(x)

butalik [34]

<h3>Answer: f ' (x) = 4x</h3>

=======================================

Work Shown:

f(x) = 2x^2 + 5

f ' (x) = d/dx[ 2x^2 + 5 ]

f ' (x) = d/dx[ 2x^2 ] + d/dx[ 5 ]

f ' (x) = 2*d/dx[ x^2 ] + d/dx[ 5 ]

f ' (x) = 2*2x^1 + 0

f ' (x) = 4x

5 0

3 years ago