Solve.The function A = A0e-0.0077x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 400 pounds of the material are placed in the vault, how much time will need to pass for only 317 pounds to remain?
A. 30 years
B. 60 years
C. 40 years
D. 35 years
Answer: A
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For an election with 4 candidates (A, B, C, and D), we have the following preference schedule:
Which candidate wins in the pairwise comparison between candidate A and candidate D?
A. A B. Neither - it is a tie. C. Cannot be determined from the information given. D. D E. none of these
Find the domain of the function h.h(x) = 
A. {x| x is a real number and x ? 0 and x ? 3 and x ? 6 and x ? 4} B. {x| x is a real number and x ? 0 and x ? -6 and x ? -4} C. {x| x is a real number and x ? 0 and x ? 6 and x ? 4} D. {x| x is a real number and x ? 3 and x ? 6 and x ? 4}
An earthquake has an amplitude of 6,500 micrometers and a period of 0.065 second. Find its measure on the Richter scale. Round to one decimal place. ?
A. 5.0 B. 11.5 C. 3.8 D. 6.5 E. 8.8
Simplify.
A. 0 B. -2.95 C. 2.95 D. ±2.95