What is the next number in this pattern 0.54,0.6,0.66,0.72

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Which value of y will make the inequality y< -1 false?

Me d is also an option but i couldn't get it in the picture