Hi guys and girls wsp hru

What numbers are included in the set of integers? what numbers are not included?

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”?

10x − 5y + 14 = 0 whats the answer pls