Question

Keiko tracks the change in outside

one afternoon. She records
temperature
a temperature of 85.4°F at noon. The
temperature rises 3.85°F over the
next 4 hours. At 5:00 PM, Keiko records
a temperature of 89.25°F. How does the
temperature change between
4:00 PM
and 5:00 PM?

Answer 1

no change

Explanation:

Given a temperature rise of 3.85 °F over 4 hours after noon, when the temperature is 85.4 °F, you want to know the change between 4 pm and 5 pm if the temperature at 5 pm is 89.25 °F.

Temperature at 4

The temperature at 4 pm is the sum of the noon temperature and the change in the 4 hours after noon:

85.4 °F + 3.85 °F = 89.25 °F

Change after 4

The change from 4 pm to 5 pm is the difference between the 5 pm temperature and the 4 pm temperature:

82.25 °F -89.25 °F = 0 °F

There is no change in the temperature between 4 pm and 5 pm.