Temperature Change: The function ( ) describes the temperature in degrees Celsius after ( ) hours. The function ( ) converts temperature to Fahrenheit. Find ( ) when ( ).
Options
A
Temperature is 84°F.
B
Temperature is 80°F.
C
Temperature is 81°F.
D
Temperature is 86°F.
Answer & Analysis
Answer
D
Analysis
1. First find :
, so .
Expand .
Then
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