SOLUTION: The weekly profit(in dollars) of a company making and selling x virtual pets each week is given by {{{ P(x)= -x^2+980x-3000 }}}. What is the maximum profit, and how many virtual pe

Algebra ->  Finance -> SOLUTION: The weekly profit(in dollars) of a company making and selling x virtual pets each week is given by {{{ P(x)= -x^2+980x-3000 }}}. What is the maximum profit, and how many virtual pe      Log On


   



Question 1155580: The weekly profit(in dollars) of a company making and selling x virtual pets each week is given by +P%28x%29=+-x%5E2%2B980x-3000+. What is the maximum profit, and how many virtual pets should be made and sold each week to maximize profit?

Found 2 solutions by ankor@dixie-net.com, josmiceli:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The weekly profit(in dollars) of a company making and selling x virtual pets each week is given by P(x) = -x^2 + 980x - 3000.
What is the maximum profit, and how many virtual pets should be made and sold each week to maximize profit?
:
-x^2 + 980x - 3000 is quadratic equation, the max value is on the axis of symmetry.
Use the formula x = -b/(2a), where a=-1; b=980
x = %28-980%29%2F%282%2A-1%29
x = +490 items sold for max profit
:
Find the actual profit at his value
P(x) = -490^2 + 980(490) - 3000
P(x) = -240100 + 480200 - 3000
P(x) = $237,100 profit

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+P%28x%29++=+-x%5E2+%2B+980x+-+3000+
The formula for the x-value of the vertex
( maximum in this case ) is:
+x%5Bmax%5D+=+-b%2F%282a%29+
+x%5Bmax%5D+=+-980%2F%28+2%2A%28-1%29%29+
+x%5Bmax%5D+=+490+
Plug this result back into equation:
+P%28+490+%29+=+-%28490%29%5E2+%2B+980%2A490+-+3000+
+P%28+490+%29+=+-240100+%2B+480200+-+3000+
+P%28+490+%29+=+237100+
-------------------------------
There maximum ;profit is $237,000
and the number of virtual pets sold
is 490
--------------------
check:
Here's the plot:
+graph%28+600%2C+600%2C+-500%2C+1000%2C+-30000%2C+300000%2C+-x%5E2+%2B+980x+-+3000+%29+
Looks about right