Question

A market analyst has projected that the cost of producing d dog leashes will be given by the polynomial10,500 + 3,9d, The revenue generated from the sale of d dog leashes will be given by the polynomial.d14,5 - 0,000030), Find a polynomial expression for the profit earned from producing and selling d dogleashes, Evaluate the expression for da 30,000.© $514,500© $295,650© $280,500© $535,500

Answer 1

Note that Profit = Revenue - Cost

From the problem, we have :

Revenue = d(14.5 - 0.00003d)

and

Cost = 10,500 + 3.9d

The profit function will be :

`\begin{gathered} \text{Profit}=\text{Revenue}-\text{Cost} \\ \text{Profit}=d(14.5-0.00003d)-(10500+3.9d) \\ \text{Profit}=14.5d-0.00003d^2-10500-3.9d \\ \text{Profit}=-10500+10.6d-0.00003d^2 \end{gathered}`

Substitute d = 30,000

`\begin{gathered} \text{Profit}=-10500+10.6d-0.00003d^2 \\ \Rightarrow-10500+10.6(30000)-0.00003(30000)^2 \\ \Rightarrow280500 \end{gathered}`

Answer :

C. $280,500