Answer:
Yes, because if you substitute 10 for r in the equation and simplify, you find that the equation is true.
Step-by-step explanation:

Answer: can you elaborate please?
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
10 knots. 5 knots above and 5 knots below are added to equal 10 knots.
1:10 or 100:1000 so the point is to just add one zero to each side and you'll get it right