
Concept explainers
(a)
To find: The approximate air temperature after
(a)

Answer to Problem 45E
Explanation of Solution
Given:The time t (in seconds) it takes for sound to travel 1 km can be modeled by
Where T is the air temperature (in degree Celsius).
First draw graph of
In graph clearly seen the air temperature after hear the thunder 2.9 seconds was 23 degree Celsius.
(b)
To find: The average rate of change of time as the air temperature change
(b)

Answer to Problem 45E
Explanation of Solution
Given: The time t (in seconds) it takes for sound to travel 1 km can be modeled by
Where T is the air temperature (in degree Celsius).
Formula Used:
The given function of time,
The average of time as air temperature change
Using formula,
Hence, the average time is 3 seconds.
Chapter 7 Solutions
Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015
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