The selling price of x number of a certain stereo can be modeled by the function r(x) =160x. the total cost of making x stereos is c(x)=71x-0.02x^2. what is the percent markup for 31 stereos?

56%

Explanation:

Given : The  selling price of x number of a certain stereo can be modeled by the function :-

The total cost of making x stereos is :

For 31 stereos, the total selling price would be :-

For 31 stereos, the total cost would be :-

Now, the percent markup will be

Hence, the percent markup for 31 stereos is 56%.

answer; strategic planning;

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.