Anonymous
The area of one penny is A = (15) (n/N), which is 2.83 cm2.
Area is defined by A=(pi)(radius)^2. If you can measure a penny's radius, you should be able to solve the problem. pi=3.14
The area enclosed by a circle is pieR2. Once you have the radius you can set up the equation.
The area of a penny is 40a, which is .4 cm squared. !
The area of a penny is very close to 0.35 cc. !
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A silver dollar's diameter is 1.043, so pi * (1.043/2)^2 = .853 inches squared. !
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You would be testing solubility