Find the exact value of the expression.cos 
A. 
B. 
C. 1
D. 
Answer: D
Mathematics
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Solve the problem.A ball is dropped from a height of 18 m and always rebounds 
of the height of the previous drop. How far does it travel (up and down) before coming to rest?
A. 90 m B. 36 m C. 108 m D. 54 m
Mathematics
Use a graphing calculator or computer to determine which of the given viewing windows displays the most appropriate graph of the specified function.f(x) = 7 + 7x - x3
A. [-10, 10] by [-10, 5] B. [-4, 5] by [-5, 5] C. [-4, 5] by [-15, 25] D. [-10, 20] by [-50, 50]
Mathematics
Find the largest open interval where the function is changing as requested.Increasing f(x) = 
x2 - 
x
A. (1, ?) B. (-1, 1) C. (-?, ?) D. (-?, -1)
Mathematics
Add or subtract. Simplify radicals where necessary.
- 
A. -5
B. -5
C. -15
D. 9
Mathematics