What can I do with these points I'm earning?

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.