The rational expression
describes the cost, in millions of dollars, to inoculate x percent of the population against a particular strain of flu.
a. Evaluate the expression for x = 40, x = 80, and x = 90. Describe the meaning of each evaluation in terms of percentage inoculated and cost.
b. For what value of x is the expression undefined?
c. What happens to the cost as x approaches 100%? How can you interpret this observation?
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