Assuming normal conditions, atmospheric pressure P (in lbs. per square inch) can be approximately calculated by using the formula below, where h represents number of feet above sea level.

$P = 14.7e^{−0.00003^{h}}$

1. What is normal pressure at sea level?

   Hint (a):

   $P = 14.7e^{−0.00003\left(0\right)}$

   Answer (a):

   14.7 Psi

2. Use the formula to calculate the atmospheric pressure under normal conditions in the mile-high city of Denver, Colorado.

   Hint (b):

   $P = 14.7e^{−0.00003\left(5280\right)}$

3. The lowest point in Death Valley is 285 feet below sea level. What is the atmospheric pressure in Death Valley under normal conditions?

   Hint (c):

   $P = 14.7e^{−0.00003\left(−285\right)}$