Question

On a chilly day in December aubree finds that the temperature increases by 1 1/4 degrees Fahrenheit every 1/3 minute. What is the rate per minute of the temperature increase?

Answer 1

3 3/4 degrees per minute

Explanation:

You want to know the rate of increase in temperature per minute when it is 1 1/4 degrees in 1/3 minute.

Rate

The time period of interest, 1 minute, is 3 times the time period associated with a 1 1/4 degree increase. Then the increase in 1 minute will be 3 times that 1 1/4 change:

3 × (1 1/4) = 3×1 + 3×(1/4) = 3 3/4

The rate is 3 3/4 °F per minute.