**Which of the following is the best approximation of 3 times the positive square root of 19?**

57

13.1

21.7

6.9

*Correct Answer : B*

We use the calculator to find the positive square root of 19, which is then multiplied by 3.

Using the calculator,

Multiplying the square root above with 3 becomes

The approximate value of 3 times the square root of 19 is 13.1.

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