Question

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

Answer 1

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

Answer 2

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