For the pair of functions, find the derivative of the composite function f(t(x) in terms of one input variable. f(t) = 5ln(t); t(x) 5x3 - 4x2 + 9x df dx

Calculus: Early Transcendentals
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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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### Calculus Problem: Derivatives of Composite Functions

**Problem Statement:**

For the pair of functions, find the derivative of the composite function \( f(t(x)) \) in terms of one input variable.

Given:
- \( f(t) = \frac{5}{\ln(t)} \)
- \( t(x) = 5x^3 - 4x^2 + 9x \)

\[
\frac{df}{dx} = \, ?
\]

**Additional Materials:**
- eBook

### Mathematical Modeling: Average Length of the Outer Ear

The average length of the outer ear for men can be modeled as:

\[ f(x) = 0.89 + 0.495 \ln x \, \text{inches} \]

Where \( x \) is aligned input so that \( x(a) = a + 10 \) and \( a \) is age, with data ranging from \( 0 < a \leq 70 \).

**Tasks:**
- Calculate the average ear length and the change of ear length for 25-year-old men.
- Round your answers to three decimal places.
Transcribed Image Text:### Calculus Problem: Derivatives of Composite Functions **Problem Statement:** For the pair of functions, find the derivative of the composite function \( f(t(x)) \) in terms of one input variable. Given: - \( f(t) = \frac{5}{\ln(t)} \) - \( t(x) = 5x^3 - 4x^2 + 9x \) \[ \frac{df}{dx} = \, ? \] **Additional Materials:** - eBook ### Mathematical Modeling: Average Length of the Outer Ear The average length of the outer ear for men can be modeled as: \[ f(x) = 0.89 + 0.495 \ln x \, \text{inches} \] Where \( x \) is aligned input so that \( x(a) = a + 10 \) and \( a \) is age, with data ranging from \( 0 < a \leq 70 \). **Tasks:** - Calculate the average ear length and the change of ear length for 25-year-old men. - Round your answers to three decimal places.
Sure, here's a transcription suitable for an educational website:

---

**Topic: Calculating Ear Length and Growth Rate**

**Problem Statement:**

The average length of the outer ear for men can be modeled by the equation:

\[ f(x) = 0.89 + 0.495 \ln x \]

where \( x \) represents age in years, and data is collected from \( 0 < x \leq 70 \).

**Objective:**

Calculate the average ear length and the rate of change of ear length for a 25-year-old man. Round your answers to three decimal places.

1. **Calculate the Average Ear Length**:

   \[ f(x) \text{ at } x = 25 \text{:} \]

   \(\text{Average ear length} = \_\_\_\_\_ \) inches

2. **Determine the Rate of Change**:

   \[ \left(\frac{df}{da}\right)_{a = 25} \]

   \(\text{Rate of change} = \_\_\_\_\_ \) inches per year

**Interpretation:**

Write a sentence of interpretation for these results. (Round your answers to three decimal places.)

"The average outer ear length for 25-year-old males is approximately ______ inches and ______ by approximately ______ inches per year."

**Additional Materials:**

- eBook

--- 

This transcription outlines the mathematical problem, objectives, and required interpretation for a clear educational understanding.
Transcribed Image Text:Sure, here's a transcription suitable for an educational website: --- **Topic: Calculating Ear Length and Growth Rate** **Problem Statement:** The average length of the outer ear for men can be modeled by the equation: \[ f(x) = 0.89 + 0.495 \ln x \] where \( x \) represents age in years, and data is collected from \( 0 < x \leq 70 \). **Objective:** Calculate the average ear length and the rate of change of ear length for a 25-year-old man. Round your answers to three decimal places. 1. **Calculate the Average Ear Length**: \[ f(x) \text{ at } x = 25 \text{:} \] \(\text{Average ear length} = \_\_\_\_\_ \) inches 2. **Determine the Rate of Change**: \[ \left(\frac{df}{da}\right)_{a = 25} \] \(\text{Rate of change} = \_\_\_\_\_ \) inches per year **Interpretation:** Write a sentence of interpretation for these results. (Round your answers to three decimal places.) "The average outer ear length for 25-year-old males is approximately ______ inches and ______ by approximately ______ inches per year." **Additional Materials:** - eBook --- This transcription outlines the mathematical problem, objectives, and required interpretation for a clear educational understanding.
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