Answer
$p\approx61.44\text{ pascals}$
Work Step by Step
Substitute $h=500$ and evaluate:
$p=101.3 e^{-0.001(500)}$
$p=101.3 e^{-0.5}$
$p \approx 61.44$
Therefore, at an altitude of $500$ meters, $p\approx 61.44$.
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