ACT Mathematics OG Test 2 - questions 1-20

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Question 1 A restaurant occupying the top floor of a skyscraper rotates as diners enjoy the view. Ling and Sarah notice that they began their meal at 7 00 p.m. looking due north. At 7 45 p.m. they had rotated 180° to a view that was due south. At this rate, how many degrees will the restaurant rotate in I hour?