Answer:
2 : 1
Step-by-step explanation:
The ratio of copper to zinc is
400 : 200 ← divide both parts by 200
= 2 : 1 ← in simplest form
The way I would look at it is that Sophia types 15 words per minute faster than Patty so every minute Sophia is 15 minutes closer to what Patty has done. 510/15=34 so after 34 minutes Sophia will have caught up to Patty
Answer:
yes
yesStep-by-step explanation:yesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyes
