An earthquake causes a piece of glass to fall off a building from a height of 2,704 ft. If the equation for height as a function of time is h(t) = -16t2 + initial,height where t is time in seconds and h(t) is height in feet, how many seconds will it take for the piece of glass to hit the ground?

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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**Problem Statement**

An earthquake causes a piece of glass to fall off a building from a height of 2,704 ft. If the equation for height as a function of time is

\[ h(t) = -16t^2 + \text{initial\_height} \]

where \( t \) is time in seconds and \( h(t) \) is height in feet, how many seconds will it take for the piece of glass to hit the ground?

**Solution**

To solve this problem, we start with the given height equation:

\[ h(t) = -16t^2 + \text{initial\_height} \]

In this specific problem:
- The initial height is 2,704 feet.

So, the height equation is:

\[ h(t) = -16t^2 + 2704 \]

We need to determine the time \( t \) when the piece of glass hits the ground. This occurs when the height \( h(t) \) is 0:

\[ 0 = -16t^2 + 2704 \]

Solving for \( t \):

1. Isolate the \( t^2 \) term:
   \[ 16t^2 = 2704 \]

2. Divide both sides by 16:
   \[ t^2 = 169 \]

3. Take the square root of both sides:
   \[ t = \sqrt{169} \]

\[ t = 13 \]

Therefore, it will take 13 seconds for the piece of glass to hit the ground.
Transcribed Image Text:**Problem Statement** An earthquake causes a piece of glass to fall off a building from a height of 2,704 ft. If the equation for height as a function of time is \[ h(t) = -16t^2 + \text{initial\_height} \] where \( t \) is time in seconds and \( h(t) \) is height in feet, how many seconds will it take for the piece of glass to hit the ground? **Solution** To solve this problem, we start with the given height equation: \[ h(t) = -16t^2 + \text{initial\_height} \] In this specific problem: - The initial height is 2,704 feet. So, the height equation is: \[ h(t) = -16t^2 + 2704 \] We need to determine the time \( t \) when the piece of glass hits the ground. This occurs when the height \( h(t) \) is 0: \[ 0 = -16t^2 + 2704 \] Solving for \( t \): 1. Isolate the \( t^2 \) term: \[ 16t^2 = 2704 \] 2. Divide both sides by 16: \[ t^2 = 169 \] 3. Take the square root of both sides: \[ t = \sqrt{169} \] \[ t = 13 \] Therefore, it will take 13 seconds for the piece of glass to hit the ground.
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