Workers at a particular mining site receive an average of 35 days paid vacation which is lower than the national average. The manager of the plant is under pressure from a local union to increase this number. However, the manager does not want to increase the number of days off because that is costly and the mine is just barely making money. Instead he decides that he will fire 10 employees in such a way as to raise the average number of days off that are reported by his employees. To achieve this goal, should he fire the 10 employees that have the most number of days off, least number of days off, or those who have about the average number of days off? Explain your answer.

Yesterday's closing prices of 2,420 different sto listed on a certain stock exchange were all different from today's closing prices. The number of stocks that closed at a higher price today than yesterday was 20 percent greater than the number that closed at a lower price. How many of the stocks closed at a higher price today than yesterday?

Roberto is the owner of the “Arrachera Queen” taco shop, which sells flank steak tacos, mmmm delicious! It is the most famous taqueria in Atizapán de Zarogoza, although its business is not a monopoly, its demand per hour makes it become one. In the surroundings there are other taquerías, but they are completely empty. His business, on Fridays (from seven at night), becomes a real madness. Faced with such a situation, Roberto would like to influence the price of the tacos to try to relieve the people of his premises, which also brings him problems with the Municipality due to the large number of cars that are parked up to triple row to get at least an order of tacos. On weekends it is even worse, because too many people come to his place. Suddenly Roberto finds out that you (one of his spoiled clients) have taken a course in Economics for Business Creation, so he asks for your help to find out what the optimal benefit is: Roberto tells him that the price per taco is p=12−1/12Q Whereas…

The average age of a preschool class is 4.5 years old. If there is one 3-year-old, five 5-year-olds, and two other children both of the same age, what is the age, in years, of the other two children?