If the arc on a particular circle has an arc length of 3 feet, and the angle
measure of the
is 60°, what is the circumference of the circle?
oa 3 feet
b. 18 feet
c. 60 feet
d.72 feet

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”?