For A(1,3) and B(1,5) what is the equation of the perpendicular bisector of AB?

Y=?

Sasha invests $1000 that earns 8% interest compounded annually. write a function that describes the value, v, of the investment after t years.

Can someone me and plz do the problem

For what value of (y) is 3^3/3^y =1/9