(Irrational Numbers LC)

Which of the following numbers are irrational?

negative four and 8237 ten thousandths, one half pi, cube root of four, and four plus the square root of twenty-five

one half pi and the cube root of four
−4.8237 and four plus the square root of twenty-five
−4.8237 and one half pi
the cube root of four and four plus the square root of twenty-five