The temperature in anchorage, Alaska was 4 degrees at 2:00 pm. The temperature dropped 2.5 degrees per hour until 9:00 pm. The temperature dropped another 9 degrees by midnight. How much colder was it at midnight than at 2:00 pm?

It was 26.5 degrees colder at midnight than at 2:00 pm

Step-by-step explanation:

We have that:

At 2:pm, it was 4 degrees.

The temperature dropped 2.5 degrees per hour until 9:00 pm.

From 2pm to 9pm, there are 7 hours. 2.5 per hour, it was 4 degrees at 2 pm.

So at 9 pm the temperature is:

4 - 2.5*7 = - 13.5

The temperature dropped another 9 degrees by midnight.

At midnight, the temperature is - 13.5 - 9 = - 22.5 degrees

How much colder was it at midnight than at 2:00 pm?

2pm: 4 degrees

Midnight: - 22.5 degrees

How much coldren

-22.5 - 4 = - 26.5

It was 26.5 degrees colder at midnight than at 2:00 pm