What is each number in scientific notation?

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

How far is x from 5 on a number line?

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”?