#### Answer

11.9 pounds per square inch

#### Work Step by Step

The formula to be used here is given in the question : P = $14.7e^{-0.21x}$
The value of x is given in the question as 1 mile
e is an irrational constant used in logarithms and its value is 2.718 (correct to 3 decimal places)
Substituting the values of x and e in the formula and solving, we find P to be 11.9 pounds per square inch