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# Thread: Who's really good in Calculus??!! reps for f-ckin life

1. ## Who's really good in Calculus??!! reps for f-ckin life

A manufacture has been selling 1300 television sets a week at 420 dollars each. A market survey indicates that for each 13 -dollar rebate offered to a buyer, the number of sets sold will increase by 130 per week.
a) Find the demand function p(x), where x is the number of the television sets sold per week, assuming that p(x) is linear.

b) How large of a rebate should the company offer to a buyer, in order to maximize its revenue?

c) If the weekly cost function is 91000+140x, how should it set the size of the rebate to maximize its profit?

got a lot more questions. mainly the business application ones are f-cking me up the azzhole

this one too

The demand for apples is given by the equation xp=200 , where x is the number of pounds demanded and p is the price per pound. If the price is increasing at a rate of 0.25 dollars per week, when the demand is 10 pounds, at what rate is the

(a) revenue changing

2. u need to call out asian miscers bro....

3. (1 pt)
Determine the equation of the tangent line at the value x=3 for the function f(x)=6x+10x-1.

The slope-intercept form of the equation of the tangent line at the value x=3 is
y= .

5. Originally Posted by cut.copy
I need it now actually...

6. Originally Posted by supacrazymonkey
A manufacture has been selling 1300 television sets a week at 420 dollars each. A market survey indicates that for each 13 -dollar rebate offered to a buyer, the number of sets sold will increase by 130 per week.
a) Find the demand function p(x), where x is the number of the television sets sold per week, assuming that p(x) is linear.
R=P(Q) P=420-x, Q=1300+10x
(420-x)(1300+10x)= -10x^2+2900x+546000

b) How large of a rebate should the company offer to a buyer, in order to maximize its revenue?
R'=-20x+2900=0, x=145, check, -10(145)^2+2900(145)+546000=-210250+420500+546000=756250(max rev.)

c) If the weekly cost function is 91000+140x, how should it set the size of the rebate to maximize its profit?
P=R-C=(-10x^2+2900x+546000)-(91000+140x)=-10x^2+2760x+455000
P=-20x+2760=0, x=138, check, -10(138)^2+2760(138)+455000=-190440+380880+455000=645440 (max profit)

got a lot more questions. mainly the business application ones are f-cking me up the azzhole

this one too

The demand for apples is given by the equation xp=200 , where x is the number of pounds demanded and p is the price per pound. If the price is increasing at a rate of 0.25 dollars per week, when the demand is 10 pounds, at what rate is the
a) Find the demand function p(x), where x is the number of the television sets sold per week, assuming that p(x) is linear.
R=P(Q) P=420-x, Q=1300+10x
(420-x)(1300+10x)= -10x^2+2900x+546000

b) How large of a rebate should the company offer to a buyer, in order to maximize its revenue?
R'=-20x+2900=0, x=145, check, -10(145)^2+2900(145)+546000=-210250+420500+546000=756250(max rev.)

c) If the weekly cost function is 91000+140x, how should it set the size of the rebate to maximize its profit?
P=R-C=(-10x^2+2900x+546000)-(91000+140x)=-10x^2+2760x+455000
P=-20x+2760=0, x=138, check, -10(138)^2+2760(138)+455000=-190440+380880+455000=645440 (max profit)

The demand for apples is given by the equation xp=200 , where x is the number of pounds demanded and p is the price per pound. If the price is increasing at a rate of 0.25 dollars per week, when the demand is 10 pounds, at what rate is the

a)XP=200, X=10, P=20
P=1.25P, R=XP, R'=12.5, Rev is inc. 12.5% every week

hope this helps

7. Originally Posted by supacrazymonkey
(1 pt)
Determine the equation of the tangent line at the value x=3 for the function f(x)=6x+10x-1.

The slope-intercept form of the equation of the tangent line at the value x=3 is
y= .
16x-1
f'(x)=16
y=3x+16 (i think)

8. thanks guys. I repped you already but I'll get you again when I recharge

9. i know its already been answered but heres a pretty obvious tip, googling parts of the question with quotation marks can often help you find the answer you need.

i googled it and found this