Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50 . Find the probability that a worker selected at random makes between $ 300 and $350 .

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?