Need help ASAP need done before 3:30

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

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Point r divides in the ratio 1 : 3. if the x-coordinate of r is -1 and the x-coordinate of p is -3, what is the x-coordinate of q? a. b. 3 c. 5 d. 6 e. -9