Steven earned a mean score in his quizes of 7.5. He misplaced one quiz. His other quizes had scores of 6.5, 7.0, 10, 8.5, 9.0, 7.5, 7.0, 8.0. Which quiz score did he misplace?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)