A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1545 and the standard deviation was 316. The test scores of four students selected at random are 1940, 1260, 2260, and 1440. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1940 is nothing. (Round to two decimal places as needed.)

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."

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41