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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.

Answer :

Answer: 8.8 (-8.8'F)

Step-by-step 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)

*Note: The temperature decreased by 8.8'F, but it increased/changed by -8.8'F. Be careful of wording.