Writing it as a decimal would be 3.85 you just divide it
Answer: This type of sampling is Simple Random Sampling
If I understood coorectly, you're looking for the fourth root of 81. This exercise can be solved by remembering that extracting the fourth root of a number is the same as raising that number to the power of 1/4.
We also need the prime factorization of 81, which is

So, the fourth root of 81 is 81 raised to the power of 1/4, which means
![\sqrt[4]{81} = \sqrt[4]{3^4} = (3^4)^{\frac{1}{4}}](https://tex.z-dn.net/?f=%20%5Csqrt%5B4%5D%7B81%7D%20%3D%20%5Csqrt%5B4%5D%7B3%5E4%7D%20%3D%20%283%5E4%29%5E%7B%5Cfrac%7B1%7D%7B4%7D%7D%20)
Now, use the property of exponents
to convert the expression into

As a = 0 , there is no sign . Its only 0. Thus the answer is (c)
The correct answer is A. 3/5 & 7/2
This is the correct answer because if you put the fractions into decimal form it is the only answer option that has both as non-terminating decimals. The rest all have at least one terminating decimal.
Hope that helps u!
Sorry its so late tho...