A bottle of white wine at room temperature ( ) is placed in a refrigerator at 6 P.M. Its temperature after t hours is changing at the rate of . By how many degrees will the temperature of the wine have dropped by 10 P.M.? Please round your answer to one decimal place.
A) 30.5
B) 25.2
C) 27.3
D) 26.0

Question

A bottle of white wine at room temperature (  ) is placed in a refrigerator at 6 P.M. Its temperature after t hours is changing at the rate of   . By how many degrees will the temperature of the wine have dropped by 10 P.M.? Please round your answer to one decimal place.
A) 30.5 
B) 25.2 
C) 27.3 
D) 26.0

Quizplus · Accepted Answer

From 6 PM to 10 PM is a total of 4 hours. Using the formula: 
ΔT = (rate of change)(time) 
ΔT = (-0.4)(4) = -1.6 
Therefore, the temperature of the wine will have dropped by 1.6 degrees. 
Starting from room temperature, which we assume is around 20°C, the wine would be at approximately 18.7°C. 
The closest answer choice is C (27.3 - 1.6 = 25.7 which is close to 18.7).

A Bottle of White Wine at Room Temperature