Determine whether the function is one-to-one by graphing and using the horizontal line test.f(x) = 
- 2
A. Yes
B. No
Answer: B
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Approximate the value using a calculator. Express answer rounded to three decimal places.?e
A. 8.540 B. 5.860 C. 23.141 D. 22.459
Write a formula for the nth term of the geometric sequence.4, - 1, 
, - 
, 
, . . .
A. an = 4 
n + 1
B. an = 4 
n - 1
C. an = 4 
n
D. an = 4 
n - 1
Solve the problem.The concentration, in parts per million, of a particular drug in a patient's blood x hours after the drug is administered is given by the functionf(x) = -x4 + 12x3 - 39x2 + 56xHow many hours after the drug is administered will it be eliminated from the bloodstream.
A. 7 hours B. 8 hours C. 15 hours D. 6 hours
If I invest $1000 in company A, there's a 40% chance I will double my money, and a 60% chance I will lose half my money. Those are the only two possibilities. What is the expected monetary value of investing $1000 in company A? (Note: include only how much more or less money I expect to have than before, not the original $1000 itself.) Give your answer as a whole number without the dollar sign.