Change 83/30 into a mixed number.
a) 2 23/30
b) 8 3/30
c) 2 30/23
d). 80 3/30

Wrote and expression for the difference of p and 4

Find the value of x for which line a is parallel to line b

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”?