Solve the problem.A certain radioactive isotope decays at a rate of 0.275% annually. Determine the half-life of this isotope, to the nearest year.
A. 109 years
B. 252 years
C. 3 years
D. 182 years
Answer: B
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Solve the problem.Four years ago, you invested $1000 in an account that returns 5.7% annually. The table shows the value of your investment at the end of each year.
Do these data represent a linear function?
A. No B. Yes
Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find 2 + 4 + 6 + 8 + . . ., the sum of the first 65 positive even integers.
A. 4294 B. 4224 C. 4290 D. 4220
For the following rational function, identify the coordinates of all removable discontinuities and sketch the graph. Identify all intercepts and find the equations of all asymptotes.f(x) = 
A. removable discontinuity at 
;
no x-intercept, no y-intercept;
asymptotes x = 3, y = 0
B. removable discontinuity at 
;
no x-intercept, no y-intercept;
asymptote x = -3
C. no removable discontinuities;
no x-intercept, no y-intercept;
asymptotes x = 3, x = 0, y = 0
D. no removable discontinuities;
no x-intercept, no y-intercept;
asymptotes x = -3 x = 0, y = 0
Solve the problem.A survey of senior citizens at a doctor's office shows that 52% of the seniors take blood pressure lowering medication and 44% take cholesterol lowering medication. 11% take both medications. What is the probability that a senior citizen takes only one of these medications given that he or she takes at least one of the medications?
A. 0.44 B. 0.52 C. 0.870 D. -0.060