Which of the following statements about the number line is true?

a.) number lines end with the number 10.

b.) numbers get smaller as you move to the left on the number line.

c.) number lines can't you compare numerals.

d.) numbers get larger as you move to the left on the number line.

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”?