Solve.An original amount of a radioactive substance decomposes such that N mg remain after t years. The function relating t and N is 
Sketch the graph.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Solve the inequality 
and write the solution set in interval notation.
A. 
B. 
C. 
D. 
E. 
Mathematics
Use the Consumer Price Index below to answer the question.
Suppose you needed $54,000 to maintain a particular standard of living in 2000. How much would you have needed in 1986 to maintain the same standard of living? If necessary, round values to the nearest thousandth.
A. $36,000 B. $33,000 C. $85,000 D. $34,000
Mathematics
Solve.120 is what percent of 240?
A. 40% B. 200% C. 50% D. 100%
Mathematics
Approximate the circumference of the circle using 3.14 for ?.
A. 109.9 cm B. 56.7 cm C. 54.95 cm D. 113.4 cm
Mathematics