3. The population of cats in a rural neighborhood has declined in the past year by roughly 30%. Residents hypothesize that this is due to
wild coyotes preying on the cats. The current cat population in the
neighborhood is estimated to be 12. Approximately how many cats
were there originally?

Which statements regarding the diagram are true? check all that apply.

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

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.