Suppose that during a nationwide program to immunize the population against a new strain of influenza, public health officials found that the cost of inoculating x% of the population was approximately

million dollars.

a. What is the domain of the function C?

b. For what values of x does C(x) have a practical interpretation in this context?

c. What was the cost of inoculating the first 50% of the population?

d. What was the cost of inoculating the second 50% of the population?

e. What percentage of the population had been inoculated by the time 37.5 million dollars had been spent?

C(x) = 150x 200 - X