Factor the follow expression: 8x−10

Select one:

2(4x−10)

2(x−5)

8(x−10)

2(4x−5)

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”?