William eats at a cafe and the cost of his meal is $31.00 because of the service, he wants to leave a 15% tip. what is his total bill including tip?

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

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.

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take