Concept explainers
a.
To find: a formula for the instantaneous rate of change of the coin.
a.
Answer to Problem 72E
Explanation of Solution
Given information: A coin is dropped from the top of a 120-foot building . The height
or displacement s (in feet) of the coin can be modeled by the position function
Calculation:
b.
To find: the average rate of change of the coin after the first two second of free fall.
b.
Answer to Problem 72E
Explanation of Solution
Given information:
Calculation:
c.
To find: the velocity of the coin as it impacts the ground.
c.
Answer to Problem 72E
The velocity of the coin as it impacts the ground is
Explanation of Solution
Given information:
Calculation:
d.
To find: the time when the velocity of the coin is -70 feet per second.
d.
Answer to Problem 72E
The time when the velocity of the coin is -70 feet per second is approximately 2.19 seconds.
Explanation of Solution
Given information:
Calculation:
e.
To graph: the model using a graphing utility.
e.
Explanation of Solution
Given information:
Calculation:
The graph of the model using the graphing utility is shown below.
Chapter 11 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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