Question

(c) Express the diagonal of a rectangle, D, in terms of its width, w, if the area of the rectangle is 13 square feet.
D(w) =

Answer 1

To find L in terms of W you have to know that A = lw
Since the area is 13.
13 = LW
Solve for L then stick it into W.

The end result should be:
\[D(w)=\sqrt{(20/w)^2 +w^2}\]