Help with math please

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?