The diagram show a regular octagons. Dennis drew diagonals from vertex. A to all other non-adjacent vertices. What is the measure is

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.

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

Find the solution on the interval [0, 2pi)