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Is Space time real or is it just an illusion? Convert r^2(cos^2theta/9 +sin^2theta/9)=1 into rectangular form? Pls, im trying to determine the total relevant cost; and increase or decrease in profits as a result of purchasing the starters. Thanks? A car is traveling at 50 mph goes around a curve that has a radius of 75 feet. what is the car s angular velocity in revolutions per minute? Solve the laplace transform y"- 2y '+ y = e^-t , y(0)=0, y'(0)=1?