Calculate the atmospheric pressure at a height of 10 km if the average density from 10 km to the top of the atmosphere (z=65 km) was 0.05 kg m^-3....

Calculate the atmospheric pressure at a height of 10 km if the average density from 10 km to the top of the atmosphere (z=65 km) was 0.05 kg m^-3. Assume gravity is constant with a value of 9.4 m/s throughout the 10-65 km layer