Originally Posted by

**CoffeeBird** I don't know what I'm doing wrong; I'm doing everything the book tells me I need to do-and i've looked at their examples but I keep getting an answer similar but not quite what is in the back of the book. Here are the answers in the back for this problem: (-4/5, -32/7) and I got (-8/5, -96/7)

Anyone see what I'm missing here?

Find the coordinates of the centroid of the area bounded by the given curves y=x³ , y=-8 , x=0

M= ∫(upper limit 0 and lower limit -2) x³ dx = ¼x^4 (from 0 to -2) = -4