Find the period of the trigonometric function f(x) = 3sin(4x) - 2cos(2x).
+
What is the maximum value of the function f(x) = x^3 - 6x^2 + 9x - 2 over the interval [0, 5]?
+
What is the average number of pets owned by each person in a neighborhood with 50 households, given that 10 households have 1 pet, 15 households have 2 pets, and 25 households have 0 pets?