Kirk bought 2 1/4 punds of lemons. He used 1/4 of the lemons to make lemonade. Kirk completed his work and found that he hsed 9 pounds of lemons . Did hs do rhe work correctly?

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm

Simplify the expression. -2/5(10+15m-20n)

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters