The sides of a rectangle are 25cm and 8cm. What is the measure, to the nearest degree, of the angle formed by the short side and a diagonal of the rectangle?

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”?