Find the area of each figure. Use 3.14 for pie.

What is the approximate circumference of the circle shown below?

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

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis