Posted by Liz on Tuesday, October 16, 2012 at 2:07am.
A worker on scaffolding 65 ft above the ground needs to lift a 390 lb bucket of cement from the ground to a point 20 feet above the ground by pulling on a rope weighing 5 lb/ft. How much work is required?

Calc II  Anonymous, Monday, May 6, 2013 at 12:59am
integrate(390+5x)from 45 to 65