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Sagot :
Answer:
next time put the whole question but
a) In the cost function you have a fixed cost and a variable cost. The variable cost is the slope of the line and the fixed cost is the y-intercept so we can say:
c(x)=4x+1550
b) If you want to break even at 50 books, let p equal the price you need to charge, then we will need to create a profit function. Profit equals revenue minus cost.
r(x)=px and c(x)=4x+1550, so P(x) (P(x) is the Profit function:
P(x)=r(x)-c(x) so:
P(x)=px-4x-1550
And we wish to break even at 50 books, so P(50)=0:
50p-4(50)-1550=0
50p-1750=0
50p=1750
p=$35.00
So you must price the book at $35.00 so that you break even when you sell 50 books.
c)
The income function is just like the profit function that we found in the last problem, and if we use the price found in that equation we have:
P(x)=35x-4x-1550
P(x)=31x-1550
d)
The variable cost should be the same, the fixed cost SHOULD go up because you have spent $200.00 more for research. The cost function should now be:
c(x)=4x+200+1550
c(x)=4x+1750
But now our revenue function has changes since we are changer our price to $20 per book, And since P(x)=r(x)-c(x) we have:
P(x)=20x-4x-1750
P(x)=16x-1750
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