SOLUTION: A video store manager observes that the number of DVDs sold seems to vary inversely as the price per DVD. If the store sells 490 DVDs per week when the price per DVD is $10.40, how

Algebra ->  Proportions  -> Lessons -> SOLUTION: A video store manager observes that the number of DVDs sold seems to vary inversely as the price per DVD. If the store sells 490 DVDs per week when the price per DVD is $10.40, how      Log On


   

Question 1187241: A video store manager observes that the number of DVDs sold seems to vary inversely as the price per DVD. If the store sells 490 DVDs per week when the price per DVD is $10.40, how many does he expect to sell if he raises the price to $16? Round your answer to the nearest integer if necessary.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
p, price
v, how many dvd sold
k, variation constant

v=k%2Fp
k=vp
k=490%2A10.4=5096
-
highlight%28v=5096%2Fp%29

So if p is $16,.....