Question

In Fairbanks, Alaska, the temperature on Tuesday at noon was -18℉. The temperature then decreased 1.2℉ each hour for the next 7 hours.

In Grand Forks, North Dakota, the temperature on Tuesday at 7pm was
¾ the temperature recorded in Fairbanks, Alaska at that same moment in time.
What is the temperature in Grand Forks, North Dakota?

Answer 1

-19.8

Explanation:

In Fairbanks , at noon -18

it decreased with 1.2 per hour for the next 7 hours .

so in total it decreased by 1.2 x 7 = 8.4

so at 7 pm it was -18-8.4 = -26.4

In Grand Forks at 7 pm 3/4 of -26.4 = -19.8