The percentage, P, of U. S. voters who use punch cards or lever machines in national elections can be modeled by the formula:=−2.5+63.1where is the number of years after 1994. In which years will fewerthan 38.1% of U. S. voters use punch cards or lever machines

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