If karl bought 3 pizza rolls, why did jeremaya eat no pickles, and what is the cost of the marble? based on your answer, explain why couches should not be used as a dependent variable in the formula x^2-3=alaska?

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”?