Solve the problem.Suppose that a cost-benefit model is given by ?f(x) = 
where f(x) is the cost in thousands of dollars of removing x percent of a given pollutant. What is the vertical asymptote of the graph of this function? What does this suggest about the possibility of removing all of the pollutant? Explain your reasoning.
What will be an ideal response?
Answers will vary. Possible answer: The vertical asymptote is 
This suggests that as x approaches 100 percent, the cost becomes infinitely large. It is therefore not possible to remove all of the pollutant.
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The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. v (ft/sec)
When is the body's acceleration equal to zero?
A. 0 < t < 2, 6 < t < 7 B. t = 2, t = 3, t = 5, t = 6 C. 2 < t < 3, 5 < t < 6 D. t = 0, t = 4, t = 7
Solve.Ms. Losch has to ship 
sofas by truck. If each truck can hold 
sofas, how many trucks are needed to ship the sofas?
A. 30 trucks B. 29 trucks C. 34 trucks D. 5 trucks
Determine if the given ordered triple is a solution of the system.(5, 4, -3)x - y + z = 12x + y + z = 6x + y - z = -4
A. solution B. not a solution
Use the fundamental identities to find the value of the trigonometric function.Find cos ? if sin ? = - 
and tan ? > 0.
A. 
B. - 
C. - 
D. - 