Which of the following is an irrational number?

Question

A.
0.333

B.
√8
C.
√49
D.
5/22

Answer 1

B. √8

Answer 2

What is 0.00000025 expressed in scientific notation?

A.
2.5 x 10^-8
B.
2.5 x 10^-7
C.
2.5 x 10^8
D.
2.5 x 10^7

Answer 3

A. 2.5 x 10^-8

Answer 4

Which expression represents the quotient below?
4.6 x 10^5/2,300,000
A.
2 x 10^0
B.
2 x 10^-1
C.
2 x 10^1
D.
2 x 10^-30

Answer 5

B. 2 x 10^-1