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 92 on the test? Round to the nearest hundredth.
A. 10.88 hr
B. 50.90 hr
C. 5.09 hr
D. 99.99 hr
Answer: C
Mathematics
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Which of the following does not describe a negative slope? ?
A. ?As x increases, y decreases. B. ?As x decreases, y increases. C. ?As x decreases, y decreases. D. ?As x increases, y increases. E. ?Both c and d. F. ?None of the above.
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Find percent notation.0.128
A. 12.8% B. 0.0128% C. 128% D. 0.128%
Mathematics
Solve the equation. Express radicals in simplest form.x2 + 4 = 68
A. ±7 B. 8 C. 34 D. ±8
Mathematics
Rewrite the number or expression as requested.3,836,000,000 (Rewrite in scientific notation.)
A. 383.6 ? 107 B. 3.836 ? 106 C. 3836 ? 10-6 D. 3.836 ? 109
Mathematics