The correct question is;
Which numbers are irrational? Select all that apply.
A) 9/15
B)√18
C)√9
D) √169
E) √78
F)π = 3.14...
Answer:
The irrational numbers are;
√18 ; √78 and π = 3.14...
Step-by-step explanation:
An irrational number is a number that cannot be written as the ratio of two integers. Its decimal form does not stop and does not repeat.
Thus;
A) 9/15 = 0.6 It's decimal stops after 6 and thus it is not irrational
B) √18 = 4.242640687119285.... The decimal doesn't repeat and the continuous dots means it's decimal doesn't stop. Thus it is an irrational number
C) √9 = 3. Doesn't have a repeating or continuous decimal and thus it's not irrational
D) √169 = 13. Doesn't have a repeating or continuous decimal and thus it's not irrational
E) √78 = 8.831760866327846......
The decimal doesn't repeat and the continuous dots means it's decimal doesn't stop. Thus it is an irrational number
F) π = 3.14.... The continuous dots means it's decimal doesn't stop. The decimal doesn't repeat and so, it's an irrational function
