Posted by Tate on Sunday, January 9, 2011 at 7:16pm.
a nickle is approximately 20mm in diameter and a quarter is about 25 mm in diameter. if the nickle is enlarges to a diameter of 128mm, what would be the diameter of the quarter using the same scale?

Algebra  Damon, Sunday, January 9, 2011 at 7:50pm
128 * (25/20) = 128 * 5/4 = 32*5 = 160

Algebra  Mike Bedell, Wednesday, November 28, 2012 at 7:20pm
The electrical resistance of a wire varies directly as its length and inversely as the square of its diameter. a wire with length of 200 inches and a diameter of one quarter of an inch has a resistance of 20 ohms. find the electrical resistance in a 500 inch wire withe the same diameter
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