Find the marginal profit function if cost and revenue are given by C(x) = 294 + 0.4x and R(x) = 3x - 0.01x².

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Find the Marginal Profit Function**

To determine the marginal profit function, we need to analyze the given cost and revenue functions. The cost function is defined as \( C(x) = 294 + 0.4x \) and the revenue function is defined as \( R(x) = 3x - 0.01x^2 \).

**Marginal Profit Function:**
The marginal profit function is derived from the profit function, which is the difference between the revenue and cost functions. Therefore, the profit function \( P(x) \) can be expressed as:

\[ P(x) = R(x) - C(x) \]

Substituting the given functions:

\[ P(x) = (3x - 0.01x^2) - (294 + 0.4x) \]

Simplifying the expression:

\[ P(x) = 3x - 0.01x^2 - 294 - 0.4x \]

\[ P(x) = 2.6x - 0.01x^2 - 294 \]

The marginal profit function \( P'(x) \) is the derivative of the profit function:

\[ P'(x) = \frac{d}{dx}(2.6x - 0.01x^2 - 294) \]

Calculating the derivative:

\[ P'(x) = 2.6 - 0.02x \]

Thus, the marginal profit function is:

\[ P'(x) = 2.6 - 0.02x \]
Transcribed Image Text:**Find the Marginal Profit Function** To determine the marginal profit function, we need to analyze the given cost and revenue functions. The cost function is defined as \( C(x) = 294 + 0.4x \) and the revenue function is defined as \( R(x) = 3x - 0.01x^2 \). **Marginal Profit Function:** The marginal profit function is derived from the profit function, which is the difference between the revenue and cost functions. Therefore, the profit function \( P(x) \) can be expressed as: \[ P(x) = R(x) - C(x) \] Substituting the given functions: \[ P(x) = (3x - 0.01x^2) - (294 + 0.4x) \] Simplifying the expression: \[ P(x) = 3x - 0.01x^2 - 294 - 0.4x \] \[ P(x) = 2.6x - 0.01x^2 - 294 \] The marginal profit function \( P'(x) \) is the derivative of the profit function: \[ P'(x) = \frac{d}{dx}(2.6x - 0.01x^2 - 294) \] Calculating the derivative: \[ P'(x) = 2.6 - 0.02x \] Thus, the marginal profit function is: \[ P'(x) = 2.6 - 0.02x \]
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