Not sure why this is incorrect. I thought the answer was 546.8 sec, but it has marked it wrong twice.

Incorrect Question 13 0 / 1 pts Provide an appropriate response. A physical fitness association is including the mile run in its hight school fitness test. The time for this event is known to possess a normal distribution with a mean of 470 seconds and a standard deviation of 60 seconds. The fitness association wants to recognize students whose times are among the top (or fastest) 10% with certificates of recognition. What time would a student need to beat in order to earn a certificate of recognition from the fitness association? 371.3 sec 393.2 sec 0546.8 sec 568.7 sec