I really need help its for the Pythagorean theorem

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687.09 dollars       happy now

step-by-step explanation: 6870

1857 times .63 equals 1169.91 subtract that from 1857 you get 687.09

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0