On a nationwide test taken by high school students, the mean score was 46 and the standard deviation was 13. The scores were normally distributed. Complete the following statements. (a) Approximately % of the student scored between 20 and 72.
(b) Approximately 99.7% of the students scored between __ and ___.

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?