At 5 P. M., the total snowfall is 2 centimeters. At 9 P. M., the total snowfall is 12 centimeters. What is the mean hourly snowfall? Write your answer in simplest form as a fraction or mixed number.

The mean hourly snowfall is 2.5 centimeters

Step-by-step explanation:

The mean hourly snowfall is the number of centimeters that fell during the period divided by the number of hours.

From 5 P. M. to 9 P. M., there are 4 hours

At 5 P. M., the total snowfall is 2 centimeters.

At 9 P. M., the total snowfall is 12 centimeters.

So in those four hours, the depth of snow increases 12-2 = 10 centimeters

10/4 = 2.5

The mean hourly snowfall is 2.5 centimeters