14. Which is not a rational number.
A. 0.23
B. √3
C.⅘

15. Which of the following is equivalent to 0.0056?
A. 5.6 × 10⁴
B. 5.6 × 10³
C. 5.6 × 10⁵

16. Which of the following numbers is irrational?
A. 78.5
B. –0.5
C. √524

17. Which of the statement is not correct?
A. An object that belongs to a set is an element of that set.

B. Sets with uncountable element is called finite set.

C. A set that is denoted by U is called intersection of set.

18. Which of the following is not a proper subset of C = {c, a, r, e}?
A. {c, a, r, e}
B. { }
C. {a, r, e}

Little help please? ​