Charley bateman obtained a loan of $2,400 to install a solar panel on his roof. the interest rate is 12% and the monthly payment is $113.04. how much of the first monthly payment covered principal?

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”?