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a= 1,052 + 1.08t
The speed of a sound wave in air depends on the air
temperature. The formula above shows the relationship
between: a, the speed of a sound wave, in feet per second,
and t, the air temperature, in degrees Fahrenheit (°F).
At which of the following air temperatures will the
speed of a sound wave be closest to 1,000 feet per
second?
A) −46°F
B) −48°F
C) −49°F
D) −50°F
Answer: B