19 - (2⁴ + 3) Please help me ​

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

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

Acircle has a circumference of 28.36 units what is the diameter of the circle