Question

A company that produces ribbon has found that the marginal cost of producing x yards of fancy ribbon is given by C'(x)=-0.00001x^2-0.2x+31 for x<1000 (greater than or equal to) where C'(x) is in cents. Approximate the total cost of manufacturing 1000 yards of ribbon, using 5 subintervals over [0,1000] and the left endpoint of each subinterval

Answer 1

we want to integrate C ' (x)

Answer 2

okay and then after that? Do I divide the interval into 5 subs?