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# Problem of the day

• Refer to the following information to answer this question.

The speed of a sound wave in air depends on the air temperature. The formula below shows the relationship between x, the speed of a sound wave, in feet per second, and t, the air temperaturein degrees Fahrenheit.

x=1017+1.13t

At which of the following air temperatures will the speed of a sound wave be closest to 975 feet per second?