Asked by Anonymous

In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 degrees Fahrenheit at an average rate of -12 degrees per hour. Over how many hours does the change take place?

9 years ago

Answered by Ms. Sue

(42 + 54) / 12 = ________ hours

9 years ago

Answered by Anonymous

8 hrs

9 years ago

Answered by Ms. Sue

Right!

9 years ago

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