Answer the last qeastion

How do i solve uniform motion problems?

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”?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²