The radius of a circle is 16 yards. What is the circle's circumference?

Which of the following is correct interpretation of the expression -4+13

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

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.