The discount on a new coat is $175. This is a discount of 20% what is the original selling price of the coat?
1 answer:
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Answer:
16π
Step-by-step explanation:
Given that:
The sphere of the radius =
The partial derivatives of
Similarly;
∴
Now; the region R = x² + y² = 12
Let;
x = rcosθ = x; x varies from 0 to 2π
y = rsinθ = y; y varies from 0 to
dA = rdrdθ
∴
The surface area
= 8π ( -2 + 4)
= 8π(2)
= 16π