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

User Nanotek
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2 Answers

6 votes

Answer:

9 hours

Explanation:


User JB King
by
6.7k points
4 votes

Answer:

8 hours

Explanation:

not negative (d)

User Uday Pratap Singh
by
6.9k points
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