In problem cost revenue and profit are in dollars and x is

Question

Question: In Problem cost, revenue, and profit are in dollars and x is the number of units. The average cost of a product changes at the rate

(C')‾(x) = (-10/x²) + (1/10)

and the average cost of 10 units is $20.00.

(a) Find the average cost function.

(b) Find the average cost of 20 units.