In a recent year, the number of DVDS shipped to an online retailer was 82.000 less than the previous year. Use an integer to describe the change in the number of DVDS shipped
An integer that describes the change in the number of DVDs shipped is

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

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.

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m