the rate of change of pressure

The atmospheric pressure at sea level is approximately 14.7 psi. The pressure changes as altitude increases and can be calculated using the relation $P(h)=14.7\cdot {e}^{-0.21h}$, where P is pressure in psi and h is altitude above sea level in miles.

Find an expression for the rate of change of pressure as altitude changes and estimate the rate of change in Denver, CO (h=1 mile).

The atmospheric pressure at sea level is approximately 14.7 psi. The pressure changes as altitude increases and can be calculated using the relation $P(h)=14.7\cdot {e}^{-0.21h}$, where P is pressure in psi and h is altitude above sea level in miles.

Find an expression for the rate of change of pressure as altitude changes and estimate the rate of change in Denver, CO (h=1 mile).