Fill in the blank: 1. Any Polynomial equation has a number of solutions or roots equal to the ___
of the equation, including complex and imaginary solutions.

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”?