We need to find height in miles.
Hence, we need to convert 73,568.417 from feet to miles.
The table tells us 5280 feet = 1 mile
Then, we can use the rule of three:
5280 feet ---------------1 mile
73,568.417 feet ----------- x miles
Then,
x = ( 73,568.417 feet/ 5280 feet ) * 1 mile
x = 13.93341231061
Rounded to the nearest tenth:
x = 13.3
