2 7 30 July 8, 2019 16 32 64 128 2 7 30 memory rule 2 7 * 300 2 7 * 3000 2 7 30 5 2 7 30 0 2 7 30 is how many hours 2 7 306 2 7/30 simplified 2 7 30 hours 2 30 7 15 2 30x 7 7 2 30 3 2 30 7 10 2 30 7 20
