The temperature drops from 48°C to 21°C in 9 hours. What is the average temperature change per hour?

2 Answers
Apr 13, 2017

#(21-48)/9=-27/9=-3^circC# per hour

Apr 13, 2017

See the entire solution process below:

Explanation:

The formula for the average change in temperature per hour is:

#a = (t_2 - t_1)/n#

Where:

#a# is the average temperature change per hour - what we are solving for.

#t_2# is the second temperature reading - 21°C for this problem.

#t_1# is the first temperature reading - 48°C for this problem.

#n# is the number of hours between readings - 9 for this problem.

Substituting and calculating #a# gives:

#a = (21 - 48)/9#

#a = (-27)/9#

#a = -3#

The average temperature change per hour was -3°C