Suppose c is inversely proportional to the square of d.
If c = 4 when d equals 3.find the constant of proportionality and write the formula for c as a function of d

c= 36/d^2

use your formula to find c when d is 5.

is it 100/d2 or 100/5^2?

I know the formula is c=k/d^2

c = ?

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1. your equation of c = 36/d^2 is correct

now just plug in d = 5
c = 36/25 or 1.44

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