Write 8,100,000,000 in scientific notation

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

Match the equivalent expressions. x - 3y + 12 12 - 3y - 2x + x + 2x 3x + 2y - 2x + y + 12 3y + 12 3x + y - 12 4y + 3y + 3x - 6y - 10 - 2 x + 3y + 2x - 3x + 7 + 5 x + 3y + 12 5 + 2y + 7x - 4x + 3y - 17

What is the upper quartile in the box plot?