Point O is on line segment NPGiven OP=4x-5,OP=4x−5, NP=3x+4,NP=3x+4, and NO=2x-3,NO=2x−3, determine the numerical length of OP.

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”?