28. A sheet of cardboard 12 ft. by 18 ft. will be made into a box by cutting equal-sized squares from each
corner and folding up the four sides. What is the height
that would maximize the volume?
A. 2.35 feet
B. 3.06 feet
C. 6.03 feet
D. 10.25 feet

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