Kendra's son needs math tutoring. She has found a tutor with lots of experience and great reviews. The tutor charges a retaining fee of $5 per week, and an hourly fee after that. After the first week of tutoring, during which they met for 10 hours, the tutor gives Kendra a bill of $336. What hourly rate does the tutor charge? [Round your answer to the nearest cent.)

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.