Question

test

Answer 1

a. Sphere
b. 15 is the diameter (diameter = a single line that cuts through the whole circle via the center)
c. Radius is half of it thus 15/2 = 7.5. Radius = 7.5
d. 4πr²
e. I've explained it, now you try this yourself. I gave your the formula. You need a calculator. You can either give it as a exact simplified answer or round it.
f. 4/3πr³
g. Solve it yourself.

Good luck!

Answer 2

Thank you so much! (:

Answer 3

No problem, if you need clarfication, feel free to ask me :)