Solve the problem.A domed ceiling is a parabolic surface. For the best lighting on the floor, a light source is to be placed at the focus of the surface. If 2 m down from the top of the dome the ceiling is 24 m wide, find the best location for the light source.
A. 54 m down from the top
B. 72 m down from the top
C. 36 m down from the top
D. 18 m down from the top
Answer: D
Mathematics
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Evaluate the following expression without using a calculator.
?
?
A. 6.6 × 104 B. ?6.6 × 10-3 C. ?6.6 × 107 D. 6.6 × 10-7 E. 6.6 × 10-4
Mathematics
Integrate the function.
A. 
sec-1 
x + C
B. 
sec-1 
x + C
C. 
sin-1 
x + C
D. 
sin-1 
x + C
Mathematics
Solve the problem.Find the image of the given figure under a reflection across the mirror line m.
A. 
B. 
C. 
D. 
Mathematics
Solve.x2 = 98
A. ± 2
B. ± 7
C. 14
D. 7
Mathematics