An in-ground swimming pool often has steps that are made from poured concrete. In the sketch of the steps below, the steps are identical, each measuring 19 inches from side to side, 11 inches from front to back, and 7 inches tall. Calculate the amount of concrete that is needed to form the steps. 19 in.11 in.7 in. The amount of concrete for the steps is cubic inches.

125 tickets were sold for the jazz band concert for a total of $1,022. students tickets cost $6 each, and general admission tickets cost $10 each. how many of each kind of tickets were sold?

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.

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]