The answer to your question is,
A) 500. The only way it would be more than 500 is for the tens place to be 5 or over. :)
-Mabel <3
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Answer: Choice B 
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Work Shown:
Angle theta is between 0 and pi/2, so this angle is in quadrant Q1.
Square both sides of the given equation

Then use the pythagorean trig identity to get
