Please help I have no idea how to help my child do this problem
Suppose that a^2 varies inversely with b^3. if a=7 when b=3 find the value of a when b=6?
a^2 = k / b^3 to find the proprtionality constant , k , sub in the given values
7^2 = k / 3^3
a^2 = 1323/6^3
a = 2.475 ( taking the positive root)