The gre is an entrance exam that most students are required to take upon entering graduate school. in 2014, the combined scores for the verbal and quantitative sections were approximately normally distributed with a mean of 310 and a standard deviation of 12.
what percent of scores were between 286 and 322? round your answer to the nearest whole number.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of