There is a set of ground elements e = {e1, e2, . . , en} and a collection of m subsets s1, s2, . . , sm of the ground elements (that is, si ⊆ e for 1 ≤ i ≤ m).the goal is to select a minimum cardinality set a of ground elements such that a contains at least one element from each subset si. give a polynomial time algorithm for this problem or state the decision version of this problem and prove that it is np-complete.

You are a team of marketing consultants. it is 2008 and the great recession has struck. one of your clients is whole foods market (sometimes known as whole paycheck). wfm has come to you and asked for strategic advice on how to adapt their product and pricing strategies in light of the economic downturn: 1. advise wfm on the various approaches that could be taken to reducing price. be sure to consider potential psychological impact of price reductions on wfm consumers. 2. based on the options outlined in part 1, recommend an approach and support with marketing theory.

Top flight is a commuter airline service that provides short flights to neighboring citles around houston, texas. to determine the quantity of planes it will purchase, top flight needs to examine the for its flights at the prices it intends to charge and at the times it intends to flight. a. supply b. demand c. equilibrium price d. break-even point

Usually, government officials make the decisions on the best ways to spend public money true or false