algebra stuff

Question

The kilopascal is a unit of measure for atmospheric pressure. Suppose the atmospheric air pressure at sea level is about 9898 kilopascals. For every 1000-m increase in altitude, the pressure decreases about 11.711.7%. What is the approximate pressure at an altitude of 30003000 m?

Answer 1

P(h) = P₀*(1 - r)^h/1000

 

Where:

• P(h) is the pressure at altitude h
• P₀ = the pressure at sea level (h=0 m) = 9898 kp
• r = rate of decrease = 11.7% (?)
• h = altitude above sea level = 3000 m (?)

 

Plug the numbers into the equation and use your calculator to find P(h=3000).