What is the answer for this function f(r)=3.14 r square. what is f(3)?

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?