Help with bs question (1 Viewer)

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InteGrand

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SlimiJay said:
Can someone please help me with this?
I have no idea what's happening
http://imgur.com/Rqaxa4p
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We know that at a speed of v km/h, the time taken (in hours) is T = 500/v (time = distance/speed).

Since we know the cost per hour as a function of v, c(v), the total cost is C = c(v)*T = (500/v)*c(v), where c(v) is the given cost function per hour.

So now we have C (total cost) as a function of v, so we can find the v to minimise C.
 
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