The Atmospheric Pressure at a Given Altitude Is Given By y=14.7

Multiple Choice

The atmospheric pressure at a given altitude is given by $y=14.7 e^{-.0000385 x}$ , where $y$ is the atmospheric pressure in pounds per square inch and $x$ is the altitude, in feet. Match each question with one of the solutions A, B, C, or D.
-For what altitude is the atmospheric pressure $10 \%$ that of sea level?

A) Solve $\frac{1}{10}(14.7) =14.7 e^{-.0000385 x}$
B) Evaluate $14.7 e^{-.0000385(3 \cdot 10) }$
C) Solve $10=14.7 e^{-.0000385 x}$
D) Evaluate $14.7 e^{-.0000385(10) }$