Rockwood bakery has many different products for sale. suppose that 70% of all customers order donuts, 50% order cinnamon rolls, and 40% order both. if a customer is randomly selected, what is the probability that she ordered neither donuts nor cinnamon rolls?

When only separate discreet points are graphed it is called?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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.