Solve the problem.Suppose that the amount of oil pumped from a well decreases at the continuous rate of 
per year. When, to the nearest year, will the well's output fall to one-eighth of its present value?
A. 2 years
B. 10 years
C. 15 years
D. 22 years
Answer: C
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Solve the problem.Find the sum of the infinite series 1 + 8r + 5r2 + 8r3 + r4 + 8r5 + 5r6 + 8a7 + r8 ... for those values of r for which it converges.
A. 
B. 
C. 
D. 
Write an equation for the linear function and use it to answer the given question. The Math Club plans to pay a visitor 
to speak at a fundraiser. Tickets will be sold for 
each. Find an equation that gives the profit/loss for the event as it varies with the number of tickets sold. How many people must attend the event for the club to break even.
A. p = 74 + 5n; 15 people B. p = 74 - 5n; 30 people C. p = -74 + 5n; 15 people D. p = -74 + 5n; 30 people
Find the least common multiple of the numbers in the group.45, 56, 150
A. 1,050 B. 2520 C. 12,600 D. 1260
Solve the problem.The pulse rate for a species of small mammal follows a normal distribution with a mean 
beats per minute and standard deviation 
beats per minute. In a population of 1000 of these mammals, how many would you expect to have a pulse rate between 195 and 243?
A. ? 540 of these mammals B. ? 500 of these mammals C. ? 480 of these mammals D. ? 690 of these mammals