Answer:
42
Step-by-step explanation:
8+8+12+4+4+3+3
Something like this for the problem.

That is the formula to find the slope. Hope it will help you.
Answer:
11
Step-by-step explanation:
11+8=19
19x3=57
we have

the solution is the interval -------> (3,∞)
therefore
the answer in the attached figure
Volume =πr²*h=π*7²*4=196π
answer B