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i found the price: p=(30-11x)*x

30x-11x^2- (8.8x^2+20x+2.5)

= 10x-19.8x^2-2.5

the i find the derivative: dp/dx and set it to zero.... i got x= .252525

then i tried to plug into c(x) but it's wrong :((

i got 8.05

Isn't profit= revenue - cost?

yeah

I got 6.87 for the price

how? it says its not correct..

price = (30-11x)x

right.

So if x = .25, price = (30-11/4).25=6.68

All depends on how many significant digits you carry for x

i tried that one too

its wrong.

cost per unit is c(x)/x

ok

If you want price per unit shouldn't you divide the price by 1000 since x is 1000 units?

howd you get that

and X in thousands of units.
I read the problem you posted.

yeah can you tell me where i went wrong?

whered you get 1000 from?

What does x represent?

the price

Read the problem. What does x represent.

thousands in units.

okay... so i got x= .25 and i times that by 1000...

so whats the correct answer?

im getting it wrong.

huh?

right.

i understand that part.

What did you get for x?

555003.

Well that is not what you posted earlier.

i plugged in 250 into c(x)

i dont know.

whats the answer then?

isn't it .252525 *1000 = x= 252.525

as many times.

Did you try 3 cents?

yeah its wrong.

I guess I can't help you then. Sorry.