The sports car is traveling along a 30 banked road having a radius of curvature of r = 500 ft. If the coefficient of static friction between the tires and the road is ms = 0.2, determine the maximum safe speed so no slipping occurs. Neglect the size of the car.

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”?