1. A professor would like to assign grades such that 7% of students receive F's. If the exam average is 62 with a standard deviation of 13, what grade should be the cutoff?

2. The owner of a seafood market determined that the average weight for a crab is 1.6lbs with a standard deviation of .4lbs. What weight is exceeded by 2% of all of the crabs? (assume the weights are normally distributed)

3. The weight of a jar of jelly is normally distributed with a mean of 16oz and a standard deviation of .02 oz. What is the probability that a jar of jelly contains more than 16.03oz?

4. The weight of a jar of jelly is normally distributed with a mean of 16oz and a standard deviation of .02 oz. What is the probability that a jar of jelly contains LESS than 16.00oz?