Which function is a quadratic function? t(x) = (x-4)2 + 3
g(x) = (2x + 4) + 3
r(x) = -x - 414 + 3(x + 2)2
s(x) = {X-6) + 3(x + 1)

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3