Question

In a lab a substance was cooled by 42°C over a period of seven hours at a constant rate what was the change in temperature each hour

Answer 1

Answer: " 6°C per hour "

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Step-by-step explanation:

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Given:  42 degrees per 7 hours;  

Convert this value to number of degrees per hour;  

                        {i.e. number of degrees per [single unit] hour ;

     This can be treated as a "unit rate" problem:

  So: 42 degrees/ 7 hr ;

         = (42/7) degrees per hr ;

         =  (42 ÷ 7) degrees per hr ;

         =   6 degrees per hr.

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The answers is: " 6°C per hour " .

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Hope this helps!  Best wishes!

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