Final answer:
The correct answer is c. √4 because √4 equals 2, which is a rational number as it can be expressed as 2/1, the ratio of two integers.
Step-by-step explanation:
The question is asking which of the given options is a rational number. A rational number is any number that can be expressed as the quotient or fraction √/p of two integers, where p is not equal to zero. It is also the case that every integer is a rational number, with q = 1.
Let's evaluate each option:
- a. √13 - This is an irrational number because √13 cannot be expressed as a simple fraction.
- b. √3 - This is also an irrational number for the same reason as √13.
- c. √4 - This is a rational number because √4 = 2, and 2 can be expressed as 2/1, which is the ratio of two integers.
- d. √2 - This, like √13 and √3, is an irrational number.
Therefore, the correct answer is c. √4.