Which number is equal to the following? 9 x 10^3

1. 93
2. 900
3. 9,000
4. 2700

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?