For many species of fish, the weight W is a function of the length L that can be expressed by the following.

W = W(L) = kL³ k = constant

Suppose that for a particular species,

k = 0.04

and that for this species, the length (in centimeters) is a function of the number of years t the fish has been alive and that this function is given by the following.

L = L(t) = 60 0.1(t 30)² 0 t 30

Find

(W L)(t)

to express W as a function of the age t of the fish.

(W L)(t) =