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2 years ago

There are TWO questions!! Please help me!! Thank you loves!! <3

Mathematics

1 answer:

Naily [24]2 years ago

7 0

Rotation is a rigid transformation. It changes neither lengths nor angle measures.

1. B. 52 degrees

2. B. 18 in.

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Help help math math math

marysya [2.9K]

507 i think. you just square 13 then multiply that by pi which is 3

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2 years ago

Read 2 more answers

Find the measure of the indicated angle to the nearest degree.

Lyrx [107]

The answer is 52

Cos0 = 16/26
Cos-1(16/26) = 0
0 = 52.02

4 0

2 years ago

The store owner purchased 26 shirts for $810.68. How much did each shirt cost?

alekssr [168]

Answer:

$31.18

Step-by-step explanation:

810.68/26=31.18

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2 years ago

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Two college roommates have each committed to donating to charity each week for the next year. The roommates’ weekly incomes are

schepotkina [342]

Answer:

C. 5 weeks.

Step-by-step explanation:

In this question we have a random variable that is equal to the sum of two normal-distributed random variables.

If we have two random variables X and Y, both normally distributed, the sum will have this properties:

$S=X+Y\\\\\ \mu_S=\mu_X+\mu_Y=30+60=90\\\\\sigma_S=\sqrt{\sigma_X^2+\sigma_Y^2}=\sqrt{10^2+20^2}=\sqrt{100+400}=\sqrt{500}=22.36$

To calculate the expected weeks that the donation exceeds $120, first we can calculate the probability of S>120:

$z=\frac{S-\mu_S}{\sigma_S} =\frac{120-90}{22.36}=\frac{30}{22.36}=1.34\\\\P(S>120)=P(z>1.34)=0.09012$

The expected weeks can be calculated as the product of the number of weeks in the year (52) and this probability:

$E=\#weeks*P(S>120)=52*0.09012=4.68$

The nearest answer is C. 5 weeks.

6 0

2 years ago

What is the greatest common factor of 189 and 200 ?

sladkih [1.3K]

The gcf of these two numbers is 1, because 189 and 200 don't have any common factors.

3 0

3 years ago