When n is a factor of a number, all factors of n are also factors of the number

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

£100.80 divided by 14 equals 7.2 how would we put this as money

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2