3) Caitlin is training for the Chicago Marathon. She planned to run 500 miles over the three monthsbefore the race. Two weeks before the race, she calculated that shehad only run 320 miles. What percentage of the 500miles has she run?

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12

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.