Chapter 1, Problem 58RE

Fish species growth For many species of fish, the weight $W$ is a function of the length $L$ that can be expressed by

$W=W\left(L\right)=k{L}^{3}k=\text{constant}$

Suppose that for a particular species, $k=0.03$ 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

$L=L\left(t\right)=65-0.1{\left(t-25\right)}^{2}0\le t\le 25$

Find $\left(WoL\right)\left(t\right)$ to express $W$ as a function of the age $t$ of the fish.