Solve the problem, using 3.14 for ?. Round to nearest tenth unless instructed differently.The diameter of a discus is about 8.66 in. What is the area of one flat surface of a discus? (Round to the nearest hundredth.)

A. 29.44 in.2
B. 235.49 in.2
C. 58.87 in.2
D. 27.19 in.2

Answer: C

Mathematics

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Express as a single logarithm and, if possible, simplify.2logc m - logc n

A. logc m2 ÷ logc n
B. logc (m2 - n)
C. logc
D. logc

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Mathematics

Find T, N, and B for the given space curve.r(t) = (cosh t)i + (sinh t)j + tk

A. T = - (tanh t sech t)i + j + (sech t)k; N = (-sech t)i - (tanh t)k;
B. T = (tanh t sech t)i + j + (sech t)k; N = (sech² t)i - (sinh t)k;
C. T = - (tanh t)i + j + (sech t)k; N = (-sech t)i - (sinh t)k ;
D. T = (tanh t)i + j + (sech t)k; N = (sech t)i - (tanh t)k;