Atmospheric density The density D(h)(in kg/m3) of Earth’s atmosphere at an altitude of h m...

Atmospheric density The density D(h)(in kg/m3) of Earth’s atmosphere at an altitude of h meters can be approximated by

where

a = 1.096 ×10−4, b= 3.42 × 10−9, c= 3.6 × 10−14,

and 0 < h < 30,000. Use the graph of D to approximate the altitude h at which the density is 0.4.