(PLEASE ANSWER<3) Determine if the given equations are functions or not functions x = 3, x2(squared) + y2(squared) =81, y = -x + 11, y2(squared) -5x - 12, y = 2x2(squared) - 6x + 4, y = -7

Marion has a bicycle that she is planning to take for a ride. the rim of the rear wheel lies 41 cm from the center of the wheel. the tire itself has a thickness of 3 cm. in order for marion to ride her bicycle 96,712 cm approximately how many rotations will the rear wheel make?