Solve the problem.In the following formula, f(x) is the minimum number of hours of studying required to attain a test score of x: 
At least how many hours of study are needed to score 94 on the test? Round to the nearest hundredth.
A. 47.70 hr
B. 4.77 hr
C. 14.51 hr
D. 100.15 hr
Answer: B
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Solve the problem.The output voltage for an AC generator is approximated by v = 156 cos 
. Find the smallest positive value of t for which the output is 144 volts. Round values to 4 decimal places.
A. 0.0038 B. 0.0086 C. 0.0028 D. 0.0076
Determine convergence or divergence of the alternating series.
A. Diverges B. Converges
Use the formula for 
to evaluate the expression.
A. 10,080 B. 4 C. 40,320 D. 8
Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. closed interval; {x|5 ? x ? 8}; [5, 8] B. open interval; {x|5 < x < 8}; (5, 8) C. half-open interval; {x|5 < x ? 8}; (5, 8] D. half-open interval; {x|5 ? x < 8}; [5, 8)