Question is in the attachment below.

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

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

What is the sum of these mixed numbers 4 2/3+ 3 1/9