Question107 Assignment 11: Problem 6 (1 point)
Suppose that for a company manufacturing calculators, the cost, and revenue equations are given by $$C=70000+40 x, \quad R=400-\frac{x^{2}}{20}$$ where the production output in one week is $x$ calculators. If the production rate is increasing at a rate of 500 calculators when the production output is 6000 calculators, find each of the following:
Rate of change in cost $=$ 20000 $\square$ Rate of change in revenue $=-20000$ $\square$ Rate of change in profit $=-24000$ $\square$