Peyton is going to an amusement park. The price of admission into the park is $30, and once she is inside the park, she will have to pay $3 for every ride she rides on. How much money would Peyton have to pay in total if she goes on 6 rides? How much would she have to pay if she goes on rr rides?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.