Solve the Problem $\mathrm { f } ( \mathrm { x } )$

question 463

Multiple Choice

Solve the problem.
-In the following formula, $\mathrm { f } ( \mathrm { x } )$ is the minimum number of hours of studying required to attain a test score of $x : f ( x ) = \frac { 0.47 x } { 100.5 - x }$ . How many hours of study are needed to score 83 ?

• A) \(22.30 \mathrm { hr }\)
• B) \(2.23 \mathrm { hr }\)
• C) \(100.93 \mathrm { hr }\)
• D) \(4.51 \mathrm { hr }\)

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