Concept explainers
In Exercises 71-90, use the following notations:
In each case, find the missing quantity. Find the exact answer.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.
90.
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College Algebra and Trigonometry (3rd Edition)
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