Question

Mike is building a rectangular dog pen the length of the pen is 20 feet greater than its with w

Answer 1

`f(W)=W^(2) +20W`

Explanation:

we know that

The area of a rectangle is equal to

`A=LW` -----> equation A

we have

`L=W+20` -----> equation B

substitute the equation B in equation A

`A=(W+20)W`

Rewrite as a function

`f(W)=(W+20)W`

`f(W)=W^(2) +20W`