Average profit. Cruzin’ Boards has found that the cost, in dollars of producing x skateboards is given by C ( x ) = 900 + 18 x 0.7 . If the revenue from the sale of x skateboards is given by R ( x ) = 75 x 0.8 , find the rate at which average profit per skateboards is changing when 20 skateboards have been built and sold.
Average profit. Cruzin’ Boards has found that the cost, in dollars of producing x skateboards is given by C ( x ) = 900 + 18 x 0.7 . If the revenue from the sale of x skateboards is given by R ( x ) = 75 x 0.8 , find the rate at which average profit per skateboards is changing when 20 skateboards have been built and sold.
Solution Summary: The author calculates the rate at which average profit per skateboard is changing when 20 vases have been produced and sold.
Average profit. Cruzin’ Boards has found that the cost, in dollars of producing x skateboards is given by
C
(
x
)
=
900
+
18
x
0.7
.
If the revenue from the sale of x skateboards is given by
R
(
x
)
=
75
x
0.8
, find the rate at which average profit per skateboards is changing when 20 skateboards have been built and sold.
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