What is the 4 digit code

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

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project