The trail to a waterfall is 4 1/5 miles long .the trail to an overlook is 1 2/3 times as long as the trail to the waterfall. which best describes the length of the trail to the overlook

a. the trail is 5 13/15 miles long

b. the trail is no more than 6 miles long

c. the trail is 7 miles long

d. the trail is more then 8 miles long

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected