Find zw and z/w. Leave your answers in polar form. z = 9(cos 50*+ i sin50*)

w = 10(cos30*+ i sin30*)

What is the product?

zw = ? [cos ?* + i sin ?*]

z/w = ? [cos ?*+ i sin ?*]

(* = degree)

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

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

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