Decide on a suitable restriction on the domain so that the function is one-to-one and the range is not changed.f(x) = 
A. [5, ?)
B. (-?, 10)
C. [-5, ?)
D. [-5, 5)
Answer: A
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Use the formula for 
to evaluate the expression.
A. 120 B. 5 C. 20 D. 4
Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 
, w = 
A. 16.3° B. 0° C. 90° D. 73.7°
Find the vertex, focus, and directrix of the parabola. Graph the equation.(y + 1)2 = 4(x + 3)
A. vertex: (3, 1)
focus: (3, 2)
directrix: y = 0
B. vertex: (-3, -1)
focus: (-2, -1)
directrix: x = -4
C. vertex: (1, 3)
focus: (2, 3)
directrix: x = 0
D. vertex: (-3, -1)
focus: (-3, 0)
directrix: y = -2
Find the book value after the given number of years, using the straight-line method. Round your answer to the nearest dollar.Find the book value at the end of the first year.Cost:$4,500Estimated life:6 yearsEstimated scrap value:$300
A. $700 B. $3,800 C. $3,750 D. $3,100