Atriangular pyramid is cut by a plane. in which case is the cross section a quadrilateral?

a: when the plane is perpendicular to the base and passes through the apex

b: when the plane is parallel to the base of the pyramid

c: when the plane intersects the base and two lateral faces of the pyramid

d: when the plane intersects the base and all three lateral faces of the pyramid

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?

John bought 2 horses at rs 20000 each

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?