alan is painting his deck gray. use the diagram at the right for 5. each unit square is 1 square unit. What is the area of the deck that alan has already painted gray.

What is the measure of ac? 5 units 13 units 26 units 39 units

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.

What is the slope of the line shown below?