A woman drops a front door key to her husband from their apartment window several stories above the ground. The function h = -16t² + 64 gives the height h of the key in feet, t seconds after she releases it. a.) How long does it take the key to reach the ground? b.) How long was the key in the air?

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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A woman drops a front door key to her
husband from their apartment window
several stories above the ground. The
function h = -16t2 + 64 gives the height h
of the key in feet, t seconds after she
releases it.
a.) How long does it take the key to reach
the ground?
b.) How long was the key in the air?
Transcribed Image Text:A woman drops a front door key to her husband from their apartment window several stories above the ground. The function h = -16t2 + 64 gives the height h of the key in feet, t seconds after she releases it. a.) How long does it take the key to reach the ground? b.) How long was the key in the air?
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