one of the largest soccer stadiums in the world is in brazil. there are 78,838 seats in the estadio do marcana studium. suppose that all the seats in this studium are sold out for the first 7 games of the season. how many tickets has been sold for the first seven games?

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?

Which is the focus of a parabola with equation y2=4x

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola