Solve the Problem $y$ Is the Minimum Number of Hours of Studying Required to Indicated

Multiple Choice

Solve the problem. Round to two decimal places unless otherwise indicated.
-In the following formula, $y$ is the minimum number of hours of studying required to attain a test score of $x$ : $y =$ $\frac { 0.50 x } { 100.5 - x }$ . How many hours of study are needed to score $86 ?$

A) 5.58 hr
B) 29.70 hr
C) 2.97 hr
D) 100.91 hr