The stained glass window shown here is in the shape of a large rectangle with a semi-circle on top. If the
dimensiohs of the rectangle are 1.2m x 3.5m find the
window area in square metres to three significant
figures

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Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

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.