Please help! A point M on a segment with endpoints X(1, -2) and Y(10,3) partitions the segment in a 4:1 ratio. Find M.

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”?