Nancy’s 50-meter freestyle swim time was 28.004 seconds. betty’s 50-meter freestyle swim time was 27.949 seconds. what was the difference between nancy’s and betty’s swim times?

Which parent function is an example of a piecewise function? answers: linear parent function quadratic parent function an exponential parent function absolute value parent function pls i’m sorry if this doesn’t make sense

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

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.