Solve the problem.The magnitudes of two stars, A and B, are 5 and 14, respectively. Compare the brightness of these stars.
A. Star A is ? 3.16 × 104 times brighter than star B.
B. Star A is ? 1.00 × 1018 times brighter than star B.
C. Star B is ? 1.00 × 104 times brighter than star A.
D. Star A is ? 3.98 × 103 times brighter than star B.
Answer: D
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Solve for x.
= 
A. 240 B. 30 C. 120 D. 15
Solve the problem.The manufacturer of a CD player has found that the revenue R (in dollars) is 
when the unit price is p dollars. If the manufacturer sets the price p to maximize revenue, what is the maximum revenue to the nearest whole dollar?
A. $1,036,800 B. $518,400 C. $259,200 D. $129,600
Find the domain and range of the inverse of the given function.f(x) = 2x - 8
A. Domain: all real numbers; range: (-?, -8) ? (-8, ?) B. Domain: [0, ?) ; range: all real numbers C. Domain: (-?, 8) ? (8, ?); range: all real numbers D. Domain and range: all real numbers
Write the improper fraction as a mixed or whole number.
A. 
B. 
C. 
D. 