An arc of length 8 in. is intersected by a central angle in a circle with a radius of 3 in. what is the measure of the angle? round your answer to the nearest tenth.

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”?