Which of the following is an example of a irrational number between 6 and 7?

a. 2 pi
b. 6.875
c. 6.
d. both a and c
e. all of the above

D. Both a and c

Step-by-step explanation:

Irrational numbers can not written in a fraction form

For A, since pi is a irrational number, 2 time of it still make it irrational

For B,  6.875 could be written in fraction as 6785/1000, a rational number

For C, the number can not expressed in a fraction form because it goes on indefinite, an irrational number.