Exam 2 Answers Key - Precalculus | MATH 115, Exams of Pre-Calculus

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Math 115 Name k QnA Spring 2018 / Exam 2 U Please show all work. Answers without adequate justification will not receive credit. Answers should be in simplified, exact form unless otherwise indicated. Include units with your answer where appropriate. (10 pts) Find a// solutions to the following inequality (graphically): cos(x) < 0 Show work. 2 Tr 2 One carved a £XeoT) © penod - 2% + DTK S £4 222, tk, eZ a te 2. Oregon Health & Science University (OHSU) sits on a hill overlooking the city of Portland. There is an aerial tram that goes from Portland’s south waterfront up to OHSU. The tram’s upper terminal, at OHSU, is 450 vertical feet above the south waterfront and at the lower terminal the tram makes a 7.5° angle with the horizontal. a. (8 pts) Draw a picture to illustrate this situation and label your picture with all pertinent information. = sates Ss ec “b (8 pis) How far “does the tram travel to get from the lower terminal to OHSU? Add any variables you use in this part to your drawing in part a. Please round to the nearest whole number. sul7S°) = - cd wil? 4 o 2490 ~ an AHO +