How to find the midpoint in a segment

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

Brent wants to know what is 5 x 1/2

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.