In an anatomy class, test scores were determined to be 20 times the number of hours, h, the student studied plus 4. Which of the following functions best describes a student’s test score depending on the number of hours, h, that the student studied?

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”?