How much interest will have to be paid on a loan of $18467 for 8 months at a simple interest rate of 12.6% per year? round to the nearest cent

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.