19)

Fence Length. A fence is to be built around a rectangular area of 10 square metres. The dimensions are x and y. On one of the sides with length x, there is a gap of 0.5x that has no fence. The goal is to find the dimensions for the minimum fence length. (a) The length equation can be expressed as O L( x ) =1.5x+- 20 X O L( x ) = 2x+ 20 X O L(x )=1.5x+. 10 X O L(x)=1.5x+ 20 O L(x)=10+2x (b) The length x for the minimum fence length is 3.16 m O 3.33 m O 3.14 m O None of the other answers O 3.65 mSuppose the price of land in a city is given by the function P(x,y) = 626 - 10 x - - 15(y - 1)2 where P(x,y) is the price of land at the point (x,y) in dollars per square metre and x and y are measured in kilometres. At what point within the city is the price of land highest? O O (2, 2 ) O (0,0) O None of the other answers O (1, 1)