Can someone please explain this?

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

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

What is the range? can’t seem to find it out