Geometry

could someone help me please?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

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

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?