The following data give the speeds of 13 cars (in mph) measured by radar, traveling on i-84. 73 75 69 68 78 69 74 76 72 79 68 77 71 a) find the values of the three quartiles and the interquartile range. b) calculate the (approximate) value of the 35th percentile (round to two decimal places). c) compute the percentile rank of 71 (round to two decimal places. do not include the % symbol).

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."

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Plz ( true - false) all triangles have interior angles whose measure sum to 90.