The stem and leaf plot below shows the number of points scored in each basketball game a team played during a season in how many games were more than 40 points scored? |stem | leaf| | 6 | 1 6 7| | 5 |2 2 8| | 4 |4 5 8 9| | 3 |0 2 6 6 6| | 2 | 0 8 | a. 4 b. 6 c. 7 d. 10

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?