SOMEONE HELP PLZ

If 20% of a number is 35, what is 50% of that number?

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.

Extra points! find the missing dimension! need asap