Question

Helllllpppp!!!!!!!!!!!1
A 120-foot-long cable of diameter 5 inches is submerged in seawater. Because of corrosion, the surface area of the cable decreases at the rate of 760 in2 per year. Express the diameter d of the cable as a function of time t (in years). (Disregard corrosion at the ends of the cable.)

Answer 1

d(t) = 600*pi - 760t?
verify

Answer 2

no...

Answer 3

im thinking 5(600pi - 760t/500pi)

Answer 4

make the last one 600 pi

Answer 5

I calculated \[\frac{152 \text{in}^2}{\pi(\text{year})}\] but I am not sure as I am new to calculus.

Answer 6

is this Calculus or PreCalculus?

Answer 7

it's pre

Answer 8

i think we need to use a surface of right cylinder

Answer 9

yep