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Trees in urban areas help keep air 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. Spruce trees cost $30 to plant and require 600 square feet of space. Maple trees cost $40 to plant and require 900 square feet of space. Spruce trees absorb 650lb/yr of carbon dioxide and maple trees absorb 300lb/yr of carbon dioxide. How many of each tree should the city plant to maximize carbon dioxide absorption?

cot^2a=cos^2a+(cota*cosa)^2

^2= squared

cot^2a=cos^2a+(cota*cosa)^2

^2= squared

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Anaheim at Chicago

Dallas at NY Islanders

Vancouver at Carolina

Los Angeles at Columbus

Philadelphia at Montreal

Calgary at Tampa Bay

NY Rangers at St. Louis

Detroit at Nashville

Washington at Winnipeg

Edmonton at Phoenix

Colorado at San Jose

Boston at Ottawa

Chicago at Minnesota

Phoenix at Anaheim

New Jersey at Tampa Bay

San Jose at Chicago

Florida at NY Rangers

NY Rangers at Buffalo

Vancouver at Ottawa

Pittsburgh at NY Islanders

Tampa Bay at Philadelphia

Winnipeg at Detroit

Boston at Columbus

San Jose at St. Louis

Anaheim at Nashville

Minnesota at Phoenix

Edmonton at Calgary

Dallas at Los Angeles

Toronto at Washington

Florida at Buffalo

Carolina at Winnipeg

Colorado at Edmonton

Washington at Ottawa

Philadelphia at Buffalo

Carolina at Edmonton

New Jersey at Toronto

Tampa Bay at NY Islanders

Columbus at Montreal

Detroit at St. Louis

Phoenix at Nashville

Boston at Winnipeg

Carolina at Calgary

Colorado at Vancouver

Los Angeles at Anaheim

Minnesota at San Jose

Montreal at Los Angeles

Toronto at Boston

Ottawa at Washington

Pittsburgh at Carolina

New Jersey at Winnipeg

NY Rangers at Tampa Bay

Chicago at St. Louis

Buffalo at Nashville

Philadelphia at Phoenix

NY Islanders at Dallas

Calgary at Edmonton

Florida at San Jose

Pittsburgh at Washington

NY Rangers at Carolina

Phoenix at Winnipeg

Ottawa at Dallas

Columbus at Calgary

Nashville at Vancouver

Florida at Los Angeles

Montreal at San Jose