Which of the following relationships represents a function? (All in picture)

Which equation represents the partial sum of the geometric series?

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

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?