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Suppose a solar system has a star that is 4.0 times as massive as our Sun.?

If that solar system has a planet the same size as Earth orbiting at a distance of 1 A.U., what is the orbital period of the planet? (Hint: The calculations for this problem are so simple that you will not need a calculator.)

Express your answer using two significant figures.

answer is in months

Using Kepler's 3rd law, since the mass is four times as large, the period would actually be 1/2 of a standard year, or 182.6 days (180 days to two significant figures). Assuming a "mean" month of 30.4 days, the answer would be about 6.0 months.

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