Boxes weigh 75 pounds, and small boxes weigh 40 pounds Write an inequality that represents the numbers of large, x, and small, y, boxes a 200 pound delivery person can take on the elevator

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”?