
Concept explainers
a.
Write an absolute value function for the difference between the car’s actual speed
a.

Answer to Problem 31PPS
Explanation of Solution
Given information:
A car speedometer reads
Calculation:
Consider a car speedometer reads
Write an absolute value function for the difference between the car’s actual speed
Hence,the absolute value function for the difference between the car’s actual speed
b.
What is an appropriate domain for the function?
b.

Answer to Problem 31PPS
Domain is
Explanation of Solution
Given information:
A car speedometer reads
Calculation:
We know that speed is always positive,
So that speed cannot be negative.
Hence the domain is,
c.
Use the domain to graph the function.
c.

Answer to Problem 31PPS
Explanation of Solution
Given information:
A car speedometer reads
Calculation:
Create a table.
Use maple to graph the function.
Hence the graph is as shown,
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