Machine a can sort 840 pieces of mail per hour, and machine b can sort 760 pieces per hour. how long will it take both machines running at the same time to sort 12,800 pieces of mail?
a) 4 hours
b) 6 hours
c) 7 hours
d) 8 hours

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships

The estimated number of people to attend the last bengals game of the season was 2000. the actual number of fans attending was 1200. by what percent did the estimate differ from the actual?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.