Scores on a Chemistry test follow a normal distribution with a mean of 65 and a standard deviation of 12. What is the approximate 90th percentile of the score distribution?

What is the measure of one interior angle of a pentagon

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)