tigernathan

I think it's B, but we can have a debate. 

Okay, let's narrow this down:

First, read the problem carefully. 

Now, we eliminate.

Choice D is wrong since it reflects of the whole U.S., not New Jersey.

Choice C is wrong since it reflects on STUDENTS at this public university in New Jersey.

Now we are down to A and B.

To me, I think it's B since it has a larger sample size, and it will have more accurate results. 

I don't know why, either. I got B.

A triangle has 180 degrees. A straight angle has 180 degrees. 

The straight line is 6x. Also, a triangle has 180. So, x=30. 

(I don't know your level, so I don't know how to explain it. I don't think you have learned too much about triangles yet, so I'm super sorry if you don't get my explanation.)

-tigernathan

(a+bi)^2=2i

then you expand to $\left(a^2-b^2\right)+2iab=2i$

$\left(a^2-b^2\right)+2iab=0+2i$

then, let's write is as system of equations: (I assume you know what it is)

$\begin{bmatrix}a^2-b^2=0\\ 2ab=2\end{bmatrix}$

So, $x=1+i,\:x=-1-i$

Hope this made sense! :D

-tigernathan

If DG is at most 1, we can draw a circle with radius 1 and center D.

We know the circle and triangle will share a 60 degree sector.

So the area of the sector is pi/6.

The area of the entire equilateral triangle is sqrt3/4*a^2, and since a=3, 9sqrt3/4.

3.8971 is the approximate area of the triangle, and 0.5236 is the approximate area of the sector.

So 0.5236/3.8971 which is around 0.134356

-tigernathan

EletricParlov, can you help??? I don't know how to explain this :(

EP, can you help?

Remember the rule: you add the exponents. So, what is the answer?

:P you answered the next one! I will make more in the future.

You got it! A lot of people think this as a trick question, since it never said equal. 

Yes, a good hint :)