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January 29, 2015

January 29, 2015

Posted by **Jamie** on Saturday, November 5, 2011 at 9:49pm.

Revenue= (Price/units)(#of units)

Cost=(cost/unit)(# of units) + set costs

Profit= Revenue-Expenses.

show the revenue and costs.

put in vertex form.

- Grade 11 U math -
**JandBsDad**, Sunday, November 6, 2011 at 9:47amx=days

135kg +3.5kg/day*x =weight

SalePrice= $(1.65-0.01*x)/kg*weight

cost= $0.8/day*x

profit=Saleprice-cost

profit(x)=(1.65-0.01x)(135 +3.5x)-0.8x

profit(x)= 1.65*135+1.65*3.5x-0.01*135x-0.01*3.5x^2-0.8x

= 222.750+4.4250x-0.035x^2-0.8x

= 222.750+3.625x-0.035x^2

set the derivative to 0 to find max profit

dprofit(x)/dx=0

3.625-0.07x=0

x=3.625/0.07

x=51.7857~=52

hope this helps

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