Can you help me please?​

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 is the equation of a line perpendicular to the line with the equation 3x+4y=8

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4