Consider the pattern shown in the table below

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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”?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?