Solve the equation for x.y = 8 cos 3x
A. x = 3 arccos 
B. x = 
arccos 
C. x = 8 arccos 
D. x = 
arccos 
Answer: D
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Use the Concavity Theorem to determine where the given function is concave up and where it is concave down. Also find all inflection points.h(z) = 
z3 - 12z2 + 10z + 46
A. Concave down for all z; no inflection points B. Concave up on (-?, 0) ? (3, ?), concave down on (0, 3); inflection points (0, 46), (3, 4) C. Concave up on (-?, 3), concave down on (3, ?); inflection point (3, 4) D. Concave up on (3, ?), concave down on (-?, 3); inflection point (3, 4)
Perform the indicated operation without the use of a calculator and express each answer in scientific notation.
A. 3 × 10-11 B. 3 × 10-5 C. 3 × 1011 D. 3 × 105
Provide an appropriate response.The register of a college recorded the amount of time each student spent waiting in line during peak registration hours one Monday. The frequency table below summarizes the results. Find the standard deviation. Round your answer to one decimal place. 
A. 5.3 B. 5.9 C. 5.8 D. 5.6 E. 5.4
Determine whether the function is one-to-one by graphing and using the horizontal line test.f(x) = -x3 + 5
A. Yes B. No