Use the four-step procedure to solve the variation problem.The amount of time it takes a swimmer to swim a race varies inversely as the average speed of the swimmer. A swimmer finishes a race in 120 seconds with an average speed of 5 feet per second. Find the average speed of the swimmer if it takes 200 seconds to finish the race.
A. 4 feet per second
B. 2 feet per second
C. 3 feet per second
D. 5 feet per second
Answer: C
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = (t2 - 3)i + ( 2t - 9)j + 8k
A. a = 
T + 
N
B. a = 
T + 
N
C. a = 
T + 
N
D. a = 
T + 
N
The wages of the employees of a company are presented in this histogram. Answer the question.
How many employees earn at least $4 and less than $6 an hour?
A. 10 B. 20 C. 34 D. 22
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. removable discontinuity at (2, -4);
x-intercept: 
, y-intercept: (0, 2);
no asymptotes
B. removable discontinuity at (2, 4);
x-intercept: (-2, 0), y-intercept: (0, 2);
no asymptotes
C. removable discontinuity at (2, 0);
x-intercept: (2, 0), y-intercept: (0, 2);
no asymptotes
D. removable discontinuity at (2, 8);
x-intercept: 
, y-intercept: (0, 2);
no asymptotes
The graph shows the total sales in thousand of dollars from the distribution of x thousand catalogs. Find the average rate of change of sales with respect to the number of catalogs distributed for the change in x.
20 to 50
A. 
B. 
C. 
D. 