Answer:
12x + 6y = 102
5x - 6y = 34
17x = 136
x = 8
y = 1
80
Step-by-step explanation:
PEMDAS- do exponents first here, simplifying that to 64+16, add those to get 80.
V =
(using differentiation product rule)
plug known values in for r, h, r', and h'