Evaluate.
for a = 15 and b = 3
A. -3
B. 2
C. 3
D. -2
Answer: A
Mathematics
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A cross-section of a parabolic reflector is shown in the figure. The bulb is located at the focus and the opening at the focus is 18 cm. Find an equation of the parabola. Let V be the origin. Find the diameter of the opening |CD|, 19 cm from the vertex.
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Based on the graph, find the range of y = f(x).
A. (-10, 10) B. (-?, ?) C. (-?, 0) or {0} or (0, ?) D. (-?, 0) or (0, ?)
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Solve the problem.How many different 11-letter words (real or imaginary) can be formed from the letters in the word ENGINEERING?
A. 25,200 B. 554,400 C. 277,200 D. 39,916,800
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The figure shows a transformation of the graph of y = x2. Write the equation for the graph.
A. g(x) = 
(x2 + 3)
B. g(x) = 
(x - 3)2
C. g(x) = -x2 - 3
D. g(x) = 
(x + 3)2
Mathematics