About 8.73 x 108 people in the world speak Chinese. About 3.22 x 107 speak Spanish. In scientific notation, how many more people speak Chinese than Spanish? (what is the difference between the number of people who speak Chinese and the number of people who speak Spanish?)

Ihave trouble finding the nth term of a linear sequence

Determine if the function below is continuous. a. continuous b. not continuous, 1 hole c. not continuous, > 2 holes d. not continuous, 2 holes

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.