Which of the following sets contains only rational numbers?

A. 776, pi, 25.209, and the square root of 9

B. 726,7/34,20.209, and the square root of 9

C. square root of 3,7/39,20.3, and the square root of 9

D. 726,7/34,20.209, and the square root of 5

Rational numbers are numbers which can be written as a fraction (the formula is p/q). They don't include roots we can't solve in order to get a whole number and pi.

A. 776, pi, 25.209, √9 - - - > NO (because of pi)

B. 726, 7/34, 20.209, √9 - - - > YES

C. √3, 7/39, 20.3, √9 - - - > NO (because of √3)

D. 726, 7/34, 20.209, √5 - - - > NO (because of √5

Note that √9 = 3, so it IS a rational number.