Can someone help me again with these math work?

The volume of a cone is 37x3 cubic units and its height is x units. which expression represents the radius of the cone's base, in units? 1 s o 3x o 6x obx 93x2

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

If a || b and e || f , what if the value of y ?