Aphysical fitness association is including the mile run in its secondary-school fitness test. the time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 60 seconds. the fitness association wants to recognize the boys whose times are among the top (or fastest) 10% with certificates of recognition. what time would the boys need to beat in order to earn a certificate of recognition from the fitness association?

a) 383.2 sec

b) 536.8 sec

c) 558.7 sec

d) 361.3 sec