at what rate of interest the compound amount on rs 8000 for 2 years is rs 10648? Please someones help me

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.

What is a possible solutions of the x> 3?

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)- 144x+360 what am i doing wrong?