Chapter 11.2, Problem 13E

(a)

To determine

To calculate: The marginal revenue and profit function of the college newspaper, The College Investigator, such that cost function of producing x copies is given by the function $C\left(x\right)=70+0.10x+0.001x^2$ dollars where selling price of one copy is $90$ cents.

(b)

To determine

To calculate: The revenue, profit, marginal revenue and marginal profit if $500$ copies of newspapers are sold such that cost function of producing x copies is given by the function $C\left(x\right)=70+0.10x+0.001x^2$ dollars where selling price of one copy is $90$ cents. Interpret the answers.

(c)

To determine

To calculate: The value of x when marginal profit is $0$ such that cost function of producing x copies is given by the function $C\left(x\right)=70+0.10x+0.001x^2$ dollars where selling price of one copy is $90$ cents. Interpret the answers.