The local health department of a small town has hired a research firm to study the development of cancer in residents in the town due to a suspected cancer-causing agent and environmental pollution. the researcher will compare data on participants at age 10, 20, 30, 40, 50, 60, 70, etc. to see if there are increasing rates of cancer in the town. this type of research study is called a:

Process activity analysis roen company incurred an activity cost of $105,600 for inspecting 40,000 units of production. management determined that the inspecting objectives could be met without inspecting every unit. therefore, rather than inspecting 40,000 units of production, the inspection activity was limited to a random selection of 5,000 units out of the 40,000 units of production. determine the inspection activity cost per unit on 40,000 units of total production both before and after the improvement. if required, round per unit amounts to the nearest cent. inspection activity before improvement $ per unit inspection activity after improvement $ per unit