Average Price of Land The rectangular region R shown in the accompanying figure represents a city's financial district. ↑y (miles) 2 O00 000 00 x (miles) The price of land in the district is approximated by the function below, where p(x,y) is the price of land at the point (x,y) in dollars/square foot and x and y are measured in miles. p(x, y) = 180 - - 13(y – 1)2 x- What is the average price of land per square foot in the district? (Give your answer correct to the nearest dollar.)

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Cylinders

A cylinder is a three-dimensional solid shape with two parallel and congruent circular bases, joined by a curved surface at a fixed distance. A cylinder has an infinite curvilinear surface.

Cones

A cone is a three-dimensional solid shape having a flat base and a pointed edge at the top. The flat base of the cone tapers smoothly to form the pointed edge known as the apex. The flat base of the cone can either be circular or elliptical. A cone is drawn by joining the apex to all points on the base, using segments, lines, or half-lines, provided that the apex and the base both are in different planes.