Provide an Appropriate Response $\frac { 120 x } { 100 - x }$

question 317

Multiple Choice

Provide an appropriate response.
-The rational expression $\frac { 120 x } { 100 - x }$ describes the cost, in millions of dollars, to inoculate x percent of the current population of cattle against a particular virus. Choose which of the following statements are true with regard to this mathematical model.
I. The expression will be undefined when $x = 100$ .
II. The cost of inoculating 70 percent of cattle is 100 million dollars more than the cost of inoculating 60 percent of cattle.
III. This expression will calculate inoculation costs for any population of cattle, no matter what the size.

• A) Only I and II are true.
• B) All three statements are true.
• C) Only I and III are true.
• D) Only II and III are true.

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