Answer:
The answer is A. 
Step-by-step explanation:
Answer:
I believe your answer would be 
Step-by-step explanation:
Take 510, divide it by 30.
510/30 = 17
This means, every 17 red blood cells, there is 1 platelet, or 
Hope this helps! - Zac
Bart earned 123 pts and lost 180
123-180=-57
Sam earned 185 pts and lost 255
185-225=-70
Bart won because he had -57 pts and Sam had -70