A number y greater than -8 and is at most -7

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Acircle has a circumference of 28.36 units what is the diameter of the circle

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.