I believe the answer is 19.1 and then you round it from there. Because 173 is not an even number. Check with someone else though. Hope this helps!
Pythagorean Theorum since that is what you are trying to prove.
Answer:
1
Step-by-step explanation:

Red is 20 and you spin it 50 times so 2/5 chance is red so that makes 3/5 chance not red
4 bowls of pasta would be served for twelve people.
4×3=12