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February 1, 2015

February 1, 2015

Posted by **nancy** on Tuesday, April 24, 2007 at 3:10am.

Write the cost function:

C=20t + 3.50(1+(x^2/600)) gives cost as a function of time and speed. But distance, is related to speed x and time, so time= distance/speed or

Cost= 20 *300/x + 3.50(1+(x^2/600)) so now cost is a function of speed.

minimize cost as a function of speed (set first derivative equal to zero).

check my math.

- ela -
**jenna**, Friday, December 12, 2014 at 4:20pmi dont know ask the driver

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