22. the time t required to do a job varies inversely as the number of people p working. it takes 3
hours for 7 volunteers to pick up rubbish from 1 mile of roadway. how long would it take 12
volunteers to complete the job?

Write the rational number in lowest terms 99/-15

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.

To decrease an amount by 16% what single multiplier would you use