Anwser questions 4 and 5 ???

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?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?