Question

*This Question Has 3 Questions in it

Question 1 Use a calculator to find
`√(61.6)` to the nearest hundredth.
Question 2 Which of the following statements is true?
Refer to Question 2 . PNG

Question 3 simplify
`√(0.81)`

Answer 1

Ques 1: 7.85

Ques 2: both
`√(0.25)` and
`-√(16)` are rational.

Ques 3: 0.9

Explanation:

Ques 1:

Solving the
`√(61.6)`, we get 7.8485.

Rounding off to nearest hundredth, we see that next digit is 8, so we increase the previous digit by 1.

So, the answer to nearest hundredth is 7.85.

Ques 2:

`√(0.25)` and
`-√(16)`to be checked whether they are rational or irrational.

We know that
`√(16)` is equal to 4.

`-√(16)` = -4 which is a rational value.

Let us solve
`√(0.25)` now.

`√(0.25) = \sqrt{(25)/(100)}\\\Rightarrow (5)/(10)`

Which is a rational value.

So, both are rational.

Ques 3:

Simplify
`√(0.81)`

0.81 can be written as
`(81)/(100)` in rational form.

Now, taking the square root, we need to take the square root for both Numerator and Denominator and then we can divide to get the desired square root.

`√(0.81) = \sqrt{(81)/(100)}\\\Rightarrow (9)/(10) = \bold{0.9}`

So, the answers are:

Ques 1: 7.85

Ques 2: both
`√(0.25)` and
`-√(16)` are rational.

Ques 3: 0.9