Write decimal as a percent.2.8
A. 280%
B. 28%
C. 0.28%
D. 0.0028%
Answer: A
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Solve the problem.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 17 minutes requires 8.5 gallons of water. Find the amount of water used in a shower lasting 4 minutes.
A. 36.125 gallons B. 8 gallons C. 2.125 gallons D. 2 gallons
Tell whether the given equation describes a parabola, an ellipse, or a hyperbola.r = 
A. Parabola B. Ellipse C. Hyperbola
Solve the problem.The magnitudes of two stars, A and B, are 3 and 25, respectively. Compare the brightness of these stars.
A. Star A is ? 1.00 × 1011 times brighter than star B. B. Star A is ? 6.31 × 108 times brighter than star B. C. Star A is ? 1.00 × 1044 times brighter than star B. D. Star B is ? 1.58 × 109 times brighter than star A.
Sketch the graph of the cross product of the unit vector 
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A. ?
B. ?
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C. ?
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D. ?
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E. ?
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