Write a function rule for the area of a triangle whose base is 4 ft more than the height. what is the area of the triangle when its height is 6 ft?

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”?