What is 90% in fraction form

Select the quadratic that has root x = 8 and x = -5

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”?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.