Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = 
, g(x) = x2
A. Yes, yes
B. Yes, no
C. No, yes
D. No, no
Answer: D
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Solve the problem.The concentration c (in mg/L) of a certain drug in the bloodstream is found to be 
where t is time (in h) after the drug is taken. Find dc/dt.
A. 
B. 
C. 
D. 
Find the median for the data given.Number of steaks served: 1, 6, 16, 22, 32, 40, 48
A. 24 steaks B. 16 steaks C. 32 steaks D. 22 steaks
For the following rational function, identify the coordinates of all removable discontinuities and sketch the graph. Identify all intercepts and find the equations of all asymptotes.f(x) = 
A. no removable discontinuities;
no x-intercept, no y-intercept;
asymptotes x = 1, x = 2, y = 0
B. removable discontinuity at (-2, -1);
no x-intercept, y-intercept: 
;
asymptotes x = - 1, y = 0
C. no removable discontinuities;
no x-intercept, no y-intercept;
asymptotes x = - 1, x = -2, y = 0
D. removable discontinuity at (2, 1);
no x-intercept, y-intercept: 
;
asymptotes x = 1, y = 0
Solve the inequality.
? 0
A. (-?, -9] or [9, ?) B. [-9, 0) or [9, ?) C. (-?, -9] or (0, 9] D. [-9, 0) or (0, 9]