A high school teacher collected the final test scores of students in her Honors United States History course. She found that the
scores were normally distributed with a mean of 70 and a standard deviation of 10. What percentage of her students passed the exam with a score of 60 or above
-15 is a real number that is less than zero called, " negative number." Possitive numbers represents a movement to the right, while negative represents a movement to the left.