Kathy has a broken dishwasher. She searches online for many hours comparing several brands and features. Then she goes to three appliance dealers to review those models and consults with the sales staff about delivery, installation, and price. In the store from which she finally makes her purchase, they give her a demonstration of the machine. Kathy's purchase is an example of a(n) problem-solving.

The role of the credit department includes: a. evaluating customers' credit applications to determine whether they meet the company's approval standards. b. approving all credit applications in order to avoid losing sales. c. collecting cash from customers. d. following unwritten approval standards for processing customers' credit applications.

Consider the following information on stocks a, b, c and their returns (in decimals) in each state: state prob. of state a b c boom 20% 0.27 0.22 0.16 good 45% 0.16 0.09 0.07 poor 25% 0.03 0 0.03 bust 10% -0.08 -0.04 -0.02 if your portfolio is invested 25% in a, 40% in b, and 35% in c, what is the standard deviation of the portfolio in percent? answer to two decimals, carry intermediate calcs. to at least four decimals.

Problem page a medical equipment industry manufactures x-ray machines. the unit cost c (the cost in dollars to make each x-ray machine) depends on the number of machines made. if x machines are made, then the unit cost is given by the function =cx+−0.3x2126x31,935 . how many machines must be made to minimize the unit cost?