Two circle with centre x and y intrtsect at a and b if the radius of the circle are 20cm and 15cm and if ab =24cm ,find the distance between the centre

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.

Graph the equationy= x+3[tex]y = x + 3[/tex]

Marking brainliest for original answer.. are these two triangles similar? how can you tell?