What is the value of 7x to the 2 power -10 ,when x = 6?

Which representation has a constant of variation of -2.5

Evaluate the expression. (9 + 5)(3 + 2)0

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”?