Question

The temperature dropped 2 °F every hour for 12 hours. What was the total number of degrees the temperature changed in the 12 hours?

24 degrees
14 degrees
-24 degrees
-2 degrees

Answer 1

The question mentions the keyword, "temperature drops" meaning we need to alternatively subtract.

`t = -2 * 12`

If we know that positive 2 times 12 is 24, we know -2 times 12 will be negative 24°, because any negative number times a positive number is always a negative number.

Answer 2

-24 degrees

Explanation:

To find the total change in temperature, multiply 12 by -2, since it dropped 2 degrees each hour for 12 hours.

12*(-2)

= -24

This means -24°F was the total number of degrees the temperature dropped.