For each relation, decide whether or not it is a function. Relation 1 DomainRangecloud 7 rock 3 sun −9 lake −1 Function Not a function Relation 2 DomainRange7 3 −1 1 −9 −8 3 4 Function Not a function Relation 3 , eh,, rt,, rr,, ee Function Not a function Relation 4 , 4n,, 5n,, 5h,, −2z Function Not a function

4. find the geometric mean of 4 and 12. 24 8

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

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4