Mr. Crawford’s 4th-Period math class I ready question

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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.

If the value of cos330°is√3/2 then find cos 165°.