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OpenStudy (anonymous):
You cut a square hole 1/4-inch wide in a piece of cardboard. With the cardboard 30 inches from your face, the moon fits exactly into the square hole. The moon is about 240,000 miles from Earth. Estimate the moon's diameter. Draw a diagram of the situation. Then write a proportion and solve the problem.
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OpenStudy (anonymous):
Solve the following for d, the moons diameter. (1/4)/30 = d/(240000)
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