Solve the problem using your calculator.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). What is the correlation coefficient?
A. -0.071
B. 0.235
C. 0.246
D. 0.708
Answer: D
Mathematics
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Find the quadratic approximation of f at x = 0.f(x) = x
A. Q(x) = 1 - 8x B. Q(x) = 1 + 8x C. Q(x) = 64x2 D. Q(x) = 8x
Mathematics
For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (4t2 - 4t)i + (t + 9)j + k ; t0 = 2
A. x = 8 + 12t, y = 11 + t, z = 1 B. x = 8 + 12t, y = 11 + t, z = 0 C. x = 12t, y = t, z = t D. x = 8 + t, y = t, z = t
Mathematics
Answer the question about percent. Round your answer to the nearest tenth of a percent, if necessary.What percent of 5 is 0.03?
A. 166.7% B. 6.0% C. 60.0% D. 0.6%
Mathematics
Solve the logarithmic equation.log6x = 4
A. 4096 B. 1,000,000 C. 24 D. 1296
Mathematics