Astudy has found that if a person has participated in a smoking cessation program in his or her lifetime, the person will have a lower life expectancy than a member of the general population.
the study concludes that smoking cessation programs lower life expectancy and recommends that no one attend them. why is the conclusion flawed?

What is the common denominator for 3/5+3/4

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?