B) On a 100 point scale, suppose the grades are approximately normally distributed with a mean of 60 and a standard deviation of 12. The professor plans to give a letter grade of a “B” to some of her students, beginning with a lower cutoff score of a 52. What should
the upper score cutoff be set at if she wishes for exactly 40% of her students to receive a "B"?

Read the scenario below and answer the question that follows. bailey is plagued with sleep problems at least a couple of times a week. she often feels tired at work and doesn't do her best work because she is "just so tired." according to the lesson, it can be said that adults have some of the same problems with sleep that bailey does. a. few b. many c. no d. all

What are the significant quotes in invisible man by ralph ellison

The probability of rolling a sum of 7 when rolling two dice simultaneously is 0.167. you decide to test that probability by rolling th dice 12 times. what is the probability that exactly 2 of the rolls is a sum of 7?