10. a cliff on the seashore is eroding at the rate of 17 centimeters per year. write and solve an equation to find the number of years in which the cliff will erode 85 centimeters.

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.

Hi if you want to play a sports related kahoot go to kahoot.it and type in this code: 659344

Factor the polynomial expression x6 – x3 – 20