(move it into whatever forum is appropriate if I get or never get a solution)
so there are a bunch of faggots selling skateboards
Quantity q of skateboards sold depends on selling price p in dollars so q=f(p). It is given that f(140)=15000 and f'(140)=-100.
The total revenue R earned from the sale of skateboards is given by R=pq.
Find dR/dp |p=140
I can't for the fucking life of me figure out how to do this
Comments
15000=f(140)
R=15000(140)
dR/dp
dR/d(140)
http://btjunkie.org/torrent/Bagatrix-Software-Solved-Algebra-Geometry-Trigonometry/284910a31a5c249999b10560e289da02ce7864dfc321
yeah okay, d(140) is going to be -100 but then what's dR? That's what I keep getting stuck on.
Fuck that it's filled with virus reports
Let me find another.
dR = R'
R = pq
R' = q
dR = q = f(p)
It's been awhile, so I could be blatantly wrong
http://btjunkie.org/torrent/Math-Programs-Algebra-1-amp-2-Solved-Trigonometry-Solved-Geometry-Solved/37764c1161eb039bdd56f237be06e4ebc85d2665a69a
dR/dp = R' = p'q
q = f(p)
p' = f'(p)
so, R' = f'(p) f(p) = (-100)(15000) = -1500000
Edit: The magnitude of the number seems really big, but it's not my homework
fuck having to show your work:thumbsdown::mad:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
f(p) is the relationship between price and units sold.
f''(p) is the _rate_ at which the units are sold. (the first derivative
Revene = 15000*140 = 2100000
That's all i understood. Is there some useful data in the Q that you missed?
R' = p'q + q'p = (1)(15000) + (-100)(140) = 1000
Forgot my multiplication rule before
Thanks so much.
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