Tyler further earns $12 per hour the store offers him a raise a 5% increase per hour after the race how much would Tyler‘s brother make per hour

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”?