If you buy one pair of shoes, then you get another pair for 50% off. Carolyn does not buy one pair of shoes. Carolyn does not get get another pair 50%. (60 points)

Pls brainliest will be awarded if answer is correct

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

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”?