9. A manufacturer can produce tires at a cost of $20 apiece. It is estimated that is the tires are sold for p dollars apiece, consumers will buy 1,560 – 12p of them each month. Express the manufacturer's monthly profit as a function of price, graph the function, and use the graph to determine the optimal selling price. How many tires will be sold each month at the optimal price?

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**Question 9: Profit Maximization for Tire Manufacturing**

A manufacturer can produce tires at a cost of $20 each. It is estimated that if the tires are sold for \( p \) dollars each, consumers will buy \( 1560 - 12p \) of them each month. 

- **Task:**
  - Express the manufacturer's monthly profit as a function of price.
  - Graph the function.
  - Use the graph to determine the optimal selling price.
  - Determine how many tires will be sold each month at the optimal price.

**Explanation:**

To solve this problem, use the following steps:

1. **Determine the Profit Function:**
   - Revenue from selling tires is given by \( R = p \times (1560 - 12p) \).
   - Cost of producing these tires is given by \( C = 20 \times (1560 - 12p) \).
   - Profit \( \pi \) is calculated as \( \pi = R - C \).

2. **Graph the Profit Function:**
   - Plot a graph with price (\( p \)) on the x-axis and profit on the y-axis based on the derived profit function.
   - Identify the vertex of the parabola, which represents the maximum profit.

3. **Find the Optimal Price:**
   - The optimal price is the value of \( p \) at which the profit function reaches its maximum.

4. **Calculate Tires Sold at Optimal Price:**
   - Substitute the optimal price back into the demand function \( 1560 - 12p \) to find the number of tires sold.

This exercise involves applying concepts of quadratic functions and graph analysis to determine optimal pricing strategies in a business context.
Transcribed Image Text:**Question 9: Profit Maximization for Tire Manufacturing** A manufacturer can produce tires at a cost of $20 each. It is estimated that if the tires are sold for \( p \) dollars each, consumers will buy \( 1560 - 12p \) of them each month. - **Task:** - Express the manufacturer's monthly profit as a function of price. - Graph the function. - Use the graph to determine the optimal selling price. - Determine how many tires will be sold each month at the optimal price. **Explanation:** To solve this problem, use the following steps: 1. **Determine the Profit Function:** - Revenue from selling tires is given by \( R = p \times (1560 - 12p) \). - Cost of producing these tires is given by \( C = 20 \times (1560 - 12p) \). - Profit \( \pi \) is calculated as \( \pi = R - C \). 2. **Graph the Profit Function:** - Plot a graph with price (\( p \)) on the x-axis and profit on the y-axis based on the derived profit function. - Identify the vertex of the parabola, which represents the maximum profit. 3. **Find the Optimal Price:** - The optimal price is the value of \( p \) at which the profit function reaches its maximum. 4. **Calculate Tires Sold at Optimal Price:** - Substitute the optimal price back into the demand function \( 1560 - 12p \) to find the number of tires sold. This exercise involves applying concepts of quadratic functions and graph analysis to determine optimal pricing strategies in a business context.
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