The reliability of a new model of CD player can be described by the exponential function 
where the reliability R is the probability (as a decimal) that the CD player is still working t years after it is manufactured. Round the answer to the nearest hundredth. Then write your answer as a percent.What is the probability that the CD player will still work 4 years after it is manufactured?
A. 9%
B. 2%
C. 92%
D. 27%
Answer: D
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Express the terminating decimal as a quotient of integers. If possible, reduce to lowest terms.0.9
A. 
B. 
C. 
D. 1
Factor completely. If the polynomial cannot be factored, say it is prime.x4 - 9
A. (x2 + 3)(x2 - 3) B. prime C. (x2 - 3)2 D. (x2 + 3)2
Solve the equation in the complex number system.x3 = -27i
A. 3(cos90° + i sin 90°), 3(cos 180° + i sin180°), 3(cos 270° + i sin 270°) B. 3(cos 30° + i sin 30°), 3(cos 60° + i sin 60°), 3(cos 90° + i sin 90°) C. 3(cos 90° + i sin 90°), 3(cos 210° + i sin 210°), 3(cos 330° + i sin 330°) D. 3(cos 210° + i sin 210°), 3(cos 270° + i sin 270°), 3(cos 330° + i sin 330°)
Solve the problem.When students at the local university held a food drive, 192 cans of food were collected on the first day of the drive, 96 the second day, 48 the third day, and so on. Find the total number of cans collected the first five days.
A. 510 cans B. 360 cans C. 378 cans D. 372 cans