Find the density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g. (Hint: find the volume first!)
a) 6 cm3
b) 12 g/cm
C) 128 g/cm
d) 8 g/cm

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.

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false

Given the numbers 6, 8, 10, and 20, what number when added would make the average of all five numbers 12? 1. (4) 2. (10) 3. (16) 4. (22) 5. (28)