I need help, I wasn't in class when we did this assignment and my teacher didn't go over it. Help the best you can :)

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

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?

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?