Tim worked to earn $63.00. if he earns $9.00 and hour, how many hours did Tim work? 5
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30 is 6 multiplied by a number y as a equation

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

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.