Question

Aeris reads the temperature of a liquid in a lab experiment. The temperature of the liquid is 7.2ºF. After 5 hours, she reads the temperature of the liquid again. The temperature of the liquid is now −1.6°F.

Aeris plots the points on a number line to determine the temperature change between these two readings.

How much did the temperature decrease?

Enter your answer as a decimal in the box.

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Answer 1

Answer: 8.8 (-8.8'F)

Explanation:

What we know:

Temperature started as 7.2

Temperature ended as -1.6

We need to find the difference

How to solve:

By doing simple subtraction, we can solve this.

Process:

Write equation 7.2 - (-1.6) = ?

Simplify 7.2 + 1.6 = ?

Solve = 8.8

Solution: {8.8 (-8.8'F)}

The temperature decreased by 8.8'F, but it increased/changed by -8.8'F.