Ahollow ball is made of rubber that is 1 centimeter thick. the ball has a radius of 5 centimeters at the outside surface. what is the approximate volume of rubber used to make the ball? use 3.14 for pi. a: 255.4 cm³ b: 267.9 cm³ c: 523.3 cm³ d: 2043.1 cm³

Answer:  A.

Step-by-step explanation:

Given: The outer radius of the ball (R)= 5 centimeters

The inner radius of the ball (r)= Outer radius - thickness

Now, the volume of the hollow ball is given by :-

Hence, the approximate volume of rubber used to make the ball=

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

i am not sure :

step-by-step explanation: