Answer:
B 7
Step-by-step explanation:
Since the triangles are similar by AAA
We can use ratios to find the length x (which is PR)
5 15
-------- = ------------
x 21
Using cross products
5 * 21 = 15 *x
Divide each side by 15
5/15 * 21 = 15x/15
1/3 * 21 =x
7 =x
we are given
An air-filled rubber ball


we can use formula of the average normal strain in the rubber

now, we can plug values
and we get

...........Answer
Answer:
x=20
Step-by-step explanation:
1-reoder the terms
2-Move constant to the right
3-dive both sides
just hit the image and you will get a representation on how to do it
Te, tm, m-e, t. The last one is correct