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Replies: 3   Last Post: Feb 16, 2005 12:22 AM

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 Guess who Posts: 134 Registered: 1/25/05
Posted: Feb 15, 2005 4:48 PM

On Tue, 15 Feb 2005 04:49:05 GMT, "Darrell" <dr6583@comcastsnip.net>
wrote:

>>> A plane with 100 seats may be chartered for \$200 per person plus a fee
>>> of \$5 per person for each empty seat. What number of passengers will
>>> provide the maximum income?

>> Let p be the number of passengers and i the income then
>>
>> i = p*200 + p*(100 - p)*5
>> = 700*p - 5p^2
>>
>> and you need to maximize i. Note that it makes no sense to
>> differentiate i wrt p because neither is a continuous variable.

>
>That doesn't matter; for all intents and purposes the problem can be
>modelled by this (continuous) function.

Agreed. Any problem in misunderstanding can be avoided if algebra
[completing the square] is used instead in this instance.

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Date Subject Author
2/15/05 Guess who
2/16/05 Darrell