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A waitress made $3.14 per hour plus $71 in tips on a Friday evening shift. The amount of money she makes for the night is given by the function P(t)=3.14t+71, where t is the number of hours she worked. How much would a waitress make for 4-hour shift if the pay rate is the same? A 7-hour shift?

 Jul 13, 2020
 #1
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Substitute 4 for t in the given function:

 

P(t)=3.14t+71

P(t)=3.14(4)+71

P(t)=12.56+71

P(t)=83.56

 

Substitute 7 for t in the given function:

P(t)-3.14t+71

P(t)=3.14(7)+71

P(t)=21.98+71

P(t)=92.98

 

In 4 hours the waitress makes $83.56 and 7 hours she makes $92.98.

 Jul 14, 2020

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