If the speed of a car is a linear function of time in seconds and 10 is less than or equal to t for time is less than or equal to 30. if after each second the speed of the car increases by 5 feet per second and after 20 seconds the speed feet per second is 80 feet per second how fast is the car going after 30 seconds?

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Solution. We can assume that
V(t)=a+bt, 10<=t<=30
as the speed of a car is a linear function of ...

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Speed is calculated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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