We will solve using the law of sines as follows:

Now, we solve for X:
![\Rightarrow X=\frac{\sin(60)}{\sin(30)}\Rightarrow X=\sqrt[]{3}](https://tex.z-dn.net/?f=%5CRightarrow%20X%3D%5Cfrac%7B%5Csin%2860%29%7D%7B%5Csin%2830%29%7D%5CRightarrow%20X%3D%5Csqrt%5B%5D%7B3%7D)
So, the length of X is sqrt(3).
<span>To solve, just think, what times 4 equals 12?
4*3 = 12
Therefore, multiply both sides by 3.
3*3 = 9 and 4 *3 = 12
9/12 is the final answer</span>
The answer is 23.2 I just entered the data into an online standard deviation calculator.