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# Ralph sold brownies for $0.99 a piece in order to earn money for baseball cards. if the cards cost$1.35 per pack, and if ralph had no money left over after buying them, what is the least number of brownies he must have sold   ### Another question on Mathematics Mathematics, 04.02.2019 19:59
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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
Ralph sold brownies for $0.99 a piece in order to earn money for baseball cards. if the cards cost$...
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