The scale of a map is 0.5 inch : 40 miles. on the map, the distance between 2 cities is 5 inches. what is the actual distance between the two cities?

The length of each stair is 11 inches. what is the rise, r, for each stair? round to the nearest inch. 2 inches 7 inches 17 inches 24 inches

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

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"