If a > b and c < 0, then:
select one:
a. ac > bc
b. eq_2672be. gif
c. ac < bc
d. none of the above

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”?