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On the planet of Mercury, 4-year-olds average 3.2 hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.7 hours and the amount of time spent alone is
c. What percent of the children spend over 4.6 hours per day unsupervised. % (Round to 2 decimal places)
d. 84.85% of all children spend at least how many hours per day unsupervised? hours. (Round to 2 decimal places)
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