User blog comment:Wildoneshelper/I question you... (Episode 5) (Academic version)/@comment-3225604-20140628160605

Suggested answers (and may not be true):

1. This is a very difficult question in my opinion. However, of what I observe, it seems transnational corporations set up their headquarters and their production base in the world, not just in one country. An example would be the McDonald's, which this company sets up many of their headquarters and sales outlets in the overseas. However, multinational corporation only has their production bases and sales outlets in the overseas while their headquarters still remain in their own country (one). I'm not sure if this is correct though.

2. Even though if you haven't learnt the formula of calculating the area of a regular hexagon, you could divide the hexagon into two isosceles trapeziums. The longer length is 12 cm while the shorter length is 6 cm. The height could be calculated using the Pythagoras theorem. $$\sqrt{27}$$ would be the height of the trapezium. Now the answer is like $$18 \sqrt{27}cm^2$$. Well, I guess I got it wrong. Oh, I haven't simplified it: $$54 \sqrt{3}cm^2$$

3a. You need to make an altitude of triangle ACD to AC, in order to have a point E. Prove that AE=EC and do some sincostan and you would have the answer.

3b. Just prove that DB+DE makes an angle of 180 degrees.

4a. No, due to inertia.

4b. This is a bit hard and I don't quite know the answer. However, the answer is probably yes because there is a force to stop the cars on a slope, but you should know lighter objects move more flexible than heavier ones, which means less force is given to make the car move faster. Same here, the force may decrease slower than other cars, which the acceleration decreases slower than other cars, which will eventually crash to each other. Unfortunately, I haven't been taught about force in slopes yet so I'm uncertain.

5. According to my previous knowledge, the burning splint should give a pop sound because the oxygen atoms in the water should have reacted with iron to form iron oxide, but who knows if the atoms in a water molecule is so easy to be separated?