a group of 4 friends shares 2 packs of gum equally . there are 8 pieces of gum in each pack .which set of equations shows how many pieces of gum ,g, each friend receives?

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”?