Zach invested $50 and tripled his money in 2 years. kayla also invested $50 and after 2 years the amount was equal to 50 to the third power. who had more money after 2 years?

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?