What is the domain of this relation?

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

Write the sentence as an equation. z plus 372 is equal to 160

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?