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A two-day environmental clean up started at 9AM on the first day.


A two-day environmental clean up started at 9AM on the first day. The number of workers fluctuated as shown in the following figure. 

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Suppose that the workers were paid 17 dollars per hour for work during the time period 9 am to 5 pm and were paid 25.5 dollars per hour for work during the rest of the day. What would the total personnel costs of the clean up have been under these conditions? 


total cost = _______ dollars

math   calculus   
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Answer #1

9 am to 5 pm= 8 hours.

So, in between, 9 am to 5 pm total cost= 8*17=136 dollars.

5 pm to 9 am= 16 hours.

So, in between 5 pm to 9 am total cost= 16*25.5=408 dollars.

Hence total personal cost is 136+408=544 dollars.

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