Which of the following results in a sum or a product that is rational? Choose all that apply.
4+9
pie x 5
3.45 x 1.2
sqrt16 x sqrt4
sqrt 7 x sqrt 2
4+9 = 13 (rational)
π x 5 = 5π (irrational)
3.45 x 1.2 = 4.14 (rational)
√16 x √4 = 4 x 2 = 8 (rational)
√7 x √2 = √14 (irrational)
The options that result in a sum or a product that is rational are 4+9, 3.45 x 1.2, and √16 x √4.