there's a chart that is labeled (key words) and (replace with) under the chart. under the key words column it says twelve more than the quotient of a number and eight. a numbered with the letter K. what is the value of the of the expression when K=40 is

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”?