Question

medal
distance question

Answer 1

http://www.brainfuse.com/highEd/liveTutoring.asp

Answer 2

So, you have
Use Pythagorean's Theorem to get the answer:
7^2 +3^2 = x^2
49+9 =x^2
58=x^2
Square root each side, then round.

Answer 3

http://www.brainfuse.com/highEd/liveTutoring.asp

Answer 4

Which is 8, so C

Answer 5

Thank you @JonnyVonny