The temperature in degrees fahrenheit of a person during an illness is given by the function T(t)= -0.01t^2-0.2t+102.5 where t=0 hours. What was the high point in the person's temperature? When did it occur

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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The temperature in degrees fahrenheit of a person during an illness is given by the function T(t)= -0.01t^2-0.2t+102.5 where t=0 hours. What was the high point in the person's temperature? When did it occur?
**Educational Text: Analysis of Temperature in Degrees Fahrenheit**

**Problem Statement:**
The temperature, \( T(t) \), in degrees Fahrenheit during an illness is given by the function:
\[ T(t) = -0.01t^2 + 0.2t + 102.5 \]

**Objective:**
Determine the highest point of the person’s temperature and when it occurs.

**Solution Steps:**

1. **Finding Critical Points:**
   - Derive \( T(t) \) to find \( T'(t) \):
   \[ T'(t) = -0.02t + 0.2 \]

2. **Set the derivative equal to zero to find critical points:**
   \[-0.02t + 0.2 = 0 \]

3. **Solve for \( t \):**
   \[ t = \frac{0.2}{0.02} = 10 \]

   - Therefore, \( t = 10 \) is a critical point.

4. **Determine if it is a Maximum:**
   - Evaluate the second derivative, \( T''(t) \):
   \[ T''(t) = -0.02 \] 

   - Since \( T''(t) < 0 \), \( t = 10 \) is a point of maxima.

5. **Calculate Maximum Temperature:**
   - Substitute \( t = 10 \) back into the original equation:
   \[ T(10) = -0.01(10)^2 + 0.2(10) + 102.5 \]
   \[ T(10) = -1 + 2 + 102.5 = 103.5 \]

**Conclusion:**
The highest temperature of 103.5 degrees Fahrenheit occurs 10 hours after the measurement begins.

**Diagram/Graph Explanation:**
There are no explicit graphs or diagrams provided in this analysis. The mathematical processing involves exploring the behavior of the quadratic function through differentiation for determining maxima.
Transcribed Image Text:**Educational Text: Analysis of Temperature in Degrees Fahrenheit** **Problem Statement:** The temperature, \( T(t) \), in degrees Fahrenheit during an illness is given by the function: \[ T(t) = -0.01t^2 + 0.2t + 102.5 \] **Objective:** Determine the highest point of the person’s temperature and when it occurs. **Solution Steps:** 1. **Finding Critical Points:** - Derive \( T(t) \) to find \( T'(t) \): \[ T'(t) = -0.02t + 0.2 \] 2. **Set the derivative equal to zero to find critical points:** \[-0.02t + 0.2 = 0 \] 3. **Solve for \( t \):** \[ t = \frac{0.2}{0.02} = 10 \] - Therefore, \( t = 10 \) is a critical point. 4. **Determine if it is a Maximum:** - Evaluate the second derivative, \( T''(t) \): \[ T''(t) = -0.02 \] - Since \( T''(t) < 0 \), \( t = 10 \) is a point of maxima. 5. **Calculate Maximum Temperature:** - Substitute \( t = 10 \) back into the original equation: \[ T(10) = -0.01(10)^2 + 0.2(10) + 102.5 \] \[ T(10) = -1 + 2 + 102.5 = 103.5 \] **Conclusion:** The highest temperature of 103.5 degrees Fahrenheit occurs 10 hours after the measurement begins. **Diagram/Graph Explanation:** There are no explicit graphs or diagrams provided in this analysis. The mathematical processing involves exploring the behavior of the quadratic function through differentiation for determining maxima.
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