Easy Points Math Q?

Question

A mountain, 100 feet below sea level, is near a valley 700 feet below sea level. How many feet higher is the mountain than the valley?

Answer 1

the answer would be 600 feat 700-100 = 600

Answer 2

700-100=600

600 feet

Answer 3

600 feet

Answer 4

700 ft - 100 ft = 600 ft higher

Answer 5

A mountain below sea level is actually called a valley, so they are both valleys, and if you try to fill them you have to fill one to 100 feet and the other to 700 feet, so in total you have to fill 800 feet.  Therefore in total it takes 800 feet to make the mountain.

But that's the last time I help you with your homework.  Bring on the big points, baby!!!