Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
A. Concave upward on (-?, -2); concave downward on (-2, ?); inflection point at (-2, 2)
B. Concave upward on (-2, ?); concave downward on (?, -2); inflection point at (-2, 2)
C. Concave upward on (-2, ?); concave downward on (-?, -2); no inflection points
D. Concave upward on (-?, -2); concave downward on (-2, ?); no inflection points
Answer: D
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Decide whether the statement is true or false.If the radius of a sphere is multiplied by n, then the surface area is multiplied by n2.
A. True B. False
Find T, N, and B for the given space curve.r(t) = (ln(cos t) + 2)i + 8j + (3 + t )k, -?/2 < t < ?/2
A. T = (sin t)i + (cos t)k; N = (cos t)i - (sin t)k; B = -j B. T = (sin t)i + (cos t)k; N = (cos t)i - (sin t)k; B = j C. T = (-sin t)i + (cos t)k; N = (-cos t)i - (sin t)k; B = -j D. T = (-sin t)i + (cos t)k; N = (-cos t)i - (sin t)k; B = j
Simplify the complex rational expression.
A. 
B. 
C. 
D. 
Solve the problem.The Mathematics Department is holding an election for department chair. Each member ranks the candidates from first to third. The preference table below shows the results of the ballots with candidates Clark (C), Jones (J), and Smith (S). 
If the Borda count method is used to determine the winner and Clark drops out, is the irrelevant alternatives criterion satisfied?
A. Yes B. No