A. bn=8+2n B. bn = 10 + 2n C. b = 10(2)" D. bn = 10(2)"-1 What is the fifteenth term of the sequence 5, -10, 20, -40, 80,...? A. -163,840 B. -81,920 C. 81,920 D. 327,680 Ted has a cupboard with 3 shelves. There are 8 glasses on each shelf. He uses the number sentence below to find the number of glasses i the cupboard. 3 x8 = 24 Which number sentence could Ted use to che his answer?