11. Trisha's Treats, a local bakery, has a square menu on the wall that covers an area of
900 in
a. Write an equation that could be used to find
s, the side length of the sign.

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”?