# Hard SAT Math Question 78 — Video Explanation | 1600.now

Source: https://1600.now/hard/78

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78

$C = 60(0.97)^{t+40} + 22$  
The given equation above gives $C$, in degrees Celsius, of a cup of coffee after being removed from a heat source, where $t$ is the time in minutes since the sample was removed. Which of the following best describes $22$ in this context?

A

$22$ is the temperature, in degrees Celsius, that the cup of coffee approaches as it cools down.

B

$22$ is the temperature, in degrees Celsius, of the coffee $40$ minutes after being removed from the heat source.

C

$22$ is the initial temperature, in degrees Celsius, of the coffee.

D

$22$ is the total change in temperature, in degrees Celsius, of the coffee as it cools down over $40$ minutes.