Which circle below has a circumference of 20 pi

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

How do you write y-10=2 (x-8) in standard form

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?