231 divied by 8 because i dont get it

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.