Find the domain and range of the following function ƒ(x) = 5|x - 2| + 4
domain: [4,8) range: (-∞,∞)
domain: (4,∞) range: (-∞,∞)
domain: (-∞,∞) range: [4,∞)
domain: (-∞,∞) range: (4,∞)

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”?