What is 9/5th in as a Decimal without dividing

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?

Joanie watched 1 out of three of a movie in the morning

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2