51. Show that the absolute minimum value of f(x) = x 2 + x 2 (8 − x)2 , x > 8 occurs at x = 10 by using a CAS to find f (x) and to solve the equation f (x) = 0.

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