Please help the number line shows the ages of Mari and her brother Saleh.

What is the range? can’t seem to find it out

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.

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.