Trees in urban areas help keep air 3 points fresh by absorbing carbon dioxide. A city has $2100 to spend on planting spruce and maple trees. The land available for planting is 45,000 square feet. Plant a spruce costs $30 and plant a maple tree costs $40. A spruce requires an area of 600 square feet and a maple tree requires an area of 900 square feet. A spruce absorbs 650 pounds of carbon dioxide per year and a maple tree absorbs 300 pounds of carbon dioxide per year. (Let x the spruce and y the maple tree). Which are vertices of the feasible region? * A(o,55), B(o,o). c(75.o), D(35,25) A(o.50), B(o,o), c(7o,o), D(25,35) A(50,0). B(0,0). C(70.0). D(35,25) OOOO A(50.o), B(0.0). C(o.7o), D(25,35) \f