use kepler's law, which states that the square of the time, t, required for a planet to orbit the sun varies directly with the cube of the mean distance, a, that the planet is from the sun. using the earth's distance of 1 astronomical unit (a.u.), determine the time, in earth years, for a planet to orbit the sun if its mean distance is 9.58 a.u. (round your answer to two decimal places.) t