# calculus

posted by
**Renita**
.

How much work is needed to extend a 20 foot fence so that one end touches the ground. The fence as a linear mass density of (.4x - .02x^2) lb./ft.

posted by
**Renita**
.

How much work is needed to extend a 20 foot fence so that one end touches the ground. The fence as a linear mass density of (.4x - .02x^2) lb./ft.