A recent survey by the U. S. Census Bureau determined that the median monthly housing rent was $643. If the first quartile for monthly housing rent was $479, find the percent of monthly housing rents that were the following values.
a. more than $479.
b. less than $643.
c. between $479 and $643.

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.