You are at the top of a 90 foot tall building

and are lifting an object that weighs 150 pounds.

The object is lifted from a height of 20 feet

to the top of the building using a chain that

weighs 0.4 pounds per foot.



Represent the amount of WORK you do as an integral.


Work = $\displaystyle {\int_{{\text{a}}}^{{\text{b}}}}$ Preview Question 6 Part 1 of 4   dx

a =

b =



Then evaluate the integral. Work = $\displaystyle {f}\infty{t}\cdot{p}{o}{u}{n}{d}{s}$