SAT Math Practice Question
$$.a=1,052+1.08 t.$$.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 $\left({ }^{\circ} \mathrm{F}\right)$. At which of the following air temperatures will the speed of a sound wave be closest to 1,000 feet per second?
- A.$-46^{\circ} \mathrm{F}$
- B.$-48^{\circ} \mathrm{F}$
- C.$-49^{\circ} \mathrm{F}$
- D.$-50^{\circ} \mathrm{F}$
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