Which situation results in a final value of zero? A the overall change in temperature when the temperature goes from –10°F to 10°F
B the total profit made when a person buys an item for $2.25 and then sells the item for $2.25
the overall change in altitude of a hot air balloon after rising 21 kilometers from sea level
D the total distance a person travels when he bikes 3.1 miles to school and then bikes 3.1 miles back home

step-by-step explanation:

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

its 50 miles away from the starting point