Question

14) Which of the following is NOT a rational number?a. product of 15 and .25b. sum of 2/5 and 1/2c. the sum of 2+√√4 and 15-√4d. product of 20 and √6

Answer 1

If we multiply 20 by squareroot 6, the answer would be 20(squareroot6). So it is a rational numbersquare root.

But in a, if we multiply 0.25 that is 1/4, by 15 it will be 15/4, so. itis a rational number

In b:

`(2)/(5)+(1)/(2)=(4+5)/(10)=(9)/(10)`

It is rational.

However, let's do the operation.

`(2+√(4))+(15\text{ - }√(4))=(2+2)+(15\text{ - }2)=4+13=17`

Therefore, it is a natural number and not a rational. The answer is c