Answer:
327,310
Step-by-step explanation:
1) Given dy / dx = x^2 + 4 = y is the function whose derivative is x^2 + 4.
2) y = x^3 / 3 + 4x + constant
Prove d y / dx = 3x^2 / 3 + 4 + 0 = x^2 + 4
Answer: x^3 / 3 + 4x + C
The sample size, n required to produce a margin of error, M, in a probability proportion distribution is given by:

The above formular shows that the sample size is inversely proportional to the Margin of error.
Then we have:

where k is some constant.
Now suppose we decrease M by a factor of 3,


Therefore, if we decrease the Margin of error by a factor of 3, we need to increase the sample size by a factor of 9.
I think the answer is maybe A