Altitude and pressure related rates problem

[joey123]

If the altitude of a space vehicle is increasing at the rate of .3 miles/sec at the instant when it is 2 miles above sea level, how fast is the pressure changing with time at this instant? By its graph, dp/dh at an altitude of 2 miles, is -2.

 

[joey123]

help

any help would be much appreciated

 

[Gene]

dh/dt=.3
dp/dh=-2
By the chain rule
dp/dt=(dp/dh)*(dh/dt) =
(-2)*(.3) =
-.6