The total cost (t) is proportional to the number (n) of items purchased at a constant price of $3.
what is the equation?

Can you simplify 4/7? 24 points will be awarded!

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

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?