If n(B) = 15, n(A ∪ B) = 28, and n(A ∩ B) = 3, find n(A).

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?