- Fri Oct 07, 2011 2:48 am
- Forum: Intermediate Algebra
- Topic: Direct variation word problem
- Replies:
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**1880**

kepler's third law of planetary motion states that the square of the period of revolution T of a planet varies directly with the cube of its mean distance a from the sun. if the mean distance of earths from the sun is 93 million miles, what is the mean distance of the planet mercury from the sun, gi...