12
No.
8:00 am to 11:14 am = 3 hours 14 minutes 8:00 am to 11:14 pm = 15 hours 14 minutes
11
8/15 = 0.53 7/10 = 0.70 No they are not
8/11 or 0.727
8
avg=11 (11+14+8)/3
11
First 11 composite numbers are 4, 6, 8, 9, 10, 12, 14, 15, 16,18 and 20.
8-11+14-2 = 9
11