Find the missing terms 11-12. 12, 17, _, 27, 32, 13-14 15, 30, 45, 90 15-16. 30, 27, _, 21, 15 Write the elapsed time. 17-18. 2:30 pm to 3:15 pm = __ hour/s 5:00 am to 6:30 am = __ hour/s 19-20.​