Sam wants to install a zip line across a ravine. one side is of the ravine is 45 feet tall while the other side is 65 feet. if the ravine is 21 feet wide how long must the zip line be?

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right