Cheyenne, Wyoming, has a latitude of 41° N. At this latitude, the number of hours of daylight D can be modeled by D = 2.914 sin(0.017t 1.321) + 12.134 where t represents the day, with t = 1 corresponding to January 1. Use a graphing utility to determine the days on which there are more than 10 hours of daylight. (Round your answers to the nearest integer.) first day last day t =

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