Math Lover

Math Puzzle:

If 3 cats can catch 3 mice in 3 minutes, how many cats are needed to catch 100 mice in 100 minutes?

I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?

1. Logical Thinking:

A bat and a ball together cost $1.10. The bat costs $1 more than the ball. How much does the ball cost?