A column in the New York Times noted that during the housing boom that ended in 2006: open double quoteGlobal banks had loaded up on these supposedly safe securities, and were at risk of becoming insolvent when their true value became known. Some banks blew up; others were bailed out. close double quote Source: Neil Irwin, open double quoteWhat 'The Big Short' Gets Right, and Wrong, About the Housing Bubble, close double quote New York Times, December 22, 2015.

Which of the following are the securities the columnist is referring to?

(A) Mortgage-backed securities.
(B) Commercial paper.
(C) Tax-deferred annuities.
(D) Government bonds.

Alocation analysis has been narrowed down to two locations, akron and boston. the main factors in the decision will be the supply of raw materials, which has a weight of .50, transportation cost, which has a weight of .40, and labor cost, which has a weight of .10. the scores for raw materials, transportation, and labor are for akron 60, 80, and 70, respectively; for boston 70, 50, and 90, respectively. given this information and a minimum acceptable composite score of 75, we can say that the manager should:

Dr. sperry, a biologist, is using excel to track growth rates of different populations of bacteria. she has a very complex formula in one cell. it begins with “round”. dr. sperry would like to see exactly how excel’s calculation reached the final rounded value that she sees in the cell. what could dr. sperry do to best understand how the calculation was made? try different formulas on her own until she reaches the value shown in excel click on the evaluate formula button in the formulas tab and then click “step in” select the cell and then look at the formula in the formula field of the ribbon remove “round” from the formula in order to see the actual value before rounding

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?