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A jeweler is heating a gold bar. It takes 7 joules of heat to raise the temperature of the bar 1°C. The initial temperature of the bar is 25°.What is the rate of change of the function, including units?



Answer :

The rate of change of the function is h(t)=7(t−25)

According to the question, it takes 7 joules of heat to raise the temperature of the bar 1∘C with the initial temperature of the bar is

25∘C.

Let us assume the heat

h(t) is the heat required to raise the temperature to t∘C. Then the function can be given as :

h(t)=7(t−25)

The table that shows the joules of heat would be required to raise the temperature of the gold bar to

26∘C,27∘C,28∘C,29∘C,30∘C,and  35∘C.

Temprature

degree Celcius Heat

Joules

26                               7

27                                 14

28                               21

29                               28

30                               35

35                                  70

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