Concept explainers
(a)
To find:The probability that the car will arrive within 15 minutes of
(a)
Explanation of Solution
The expression for the probability that a car will arrive within
The probability that the car will arrive within 15 minutes of
Therefore, the probability that the car will arrive within 15 minutes of
(b)
To find:The probability that the car will arrive within 30 minutes of
(b)
Explanation of Solution
The expression for the probability that a car will arrive within
The probability that the car will arrive within 30 minutes of
Therefore, the probability that the car will arrive within 30 minutes of
(c)
To find:The value
(c)
Explanation of Solution
The expression for the probability that a car will arrive within
Let us consider
Therefore, the value
(d)
To graph :The plot of
(d)
Explanation of Solution
The expression for the probability that a car will arrive within
The graph of
Figure (1)
Therefore, the graph of
(e)
To find:The minutes required for the probability to reach
(e)
Explanation of Solution
The expression for the probability that a car will arrive within
Now,
The graph obtained is shown in figure below.
Figure (2)
By intersection the required time is
Therefore, the minutes required is
Chapter 5 Solutions
Precalculus Enhanced with Graphing Utilities
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Glencoe Math Accelerated, Student Edition
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