Can someone answer. there is one problem. there's a picture. you!

The volume of cylinder with radius r and height h 
pi r^2 x h  so we have
1000=volume 
1000= (3-14)(3)^2 x h
we get 35.38 rounds to 35

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.