2 40 10 4 July 8, 2019 16 32 64 128 2 3t 10 )+ t 40 4t 40 2 10 4k )+ 2k 2 40 to 4 10 how many hours 40 2 x 4 )- 10 2 hours and 40 minutes after 10 45 2 3x 10 )+ x 40 4x