The Puerto Rican Trench is one of only two trenches in the Atlantic ocean. When sonar is used to detect the depth of the ocean at this trench, and it takes 11.73 seconds for the ship to receive the signal back, how deep is the trench? Assume the speed of sound in water is 1500m/s. (Be sure to include a unit in your answer. (** Use scrap paper and a calculator.) Formulas: depth = , (1500 m/sec xecho travel time) Velocity= distance / time

I’m which figure is point g an orthocenter

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?