Do you want (square root of 18) * 47 = 199.4041123 or the square root of (18 * 47) = 29.0867914 ?
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6.8556546
To figure this out, I always start with square roots I know, and that are close to 47. So, first, I would figure out that the square root of a number such as 36 is 6. The square root of 49 is 7. Now, since there are no other whole numbers between 6 and 7, and the square root of 47 falls between the square root of 36 and 49, we can say that the square root of 47 is between the whole numbers 6 and 7.
The answer is 6.86
13
To find a square root that is not a perfect square, it will be necessary to find an approximate answer by using the procedure given in the example below: Since 40 is between 36 and 49, then the square root of 40 is between 6 ( √36), and 7 (√49). 36 < 40 < 47 √36 < √40 < √47 6 < √40 < 7 Since 40 is almost less than halfway between 36 and 47, √40 is almost less than halfway between √36 and √47. To check, multiply 6.32 x 6.32 = 39.9424 or 40. For a better approximation use the calculator.