Jacob weighs more than 50 pounds more than his younger brother jared. jared weighs 46 pounds. let x represent jacobs weight. how much does jacob weigh? write an inequality show your work

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”?