A sink can be filled from the faucet in minutes . It takes only 3 minutes to empty the sink when the drain is open. the sink is full and both the faucet and the drain are open, how long will it take to empty the sink?

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.

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2