Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=10
6 and σ=15. (a) What proportion of children aged 13 to 15 years old have scores on this test above 92 ? (Reminder: proportions are between 0 and 1 - don't put in percentages!)
Ratio of area of circles: = πr2 :πc2 = πr2 :π r2 4 = 4 :1. 1. The small equilateral triangle is rotated through 60° about O, the center of the circle. The arm of the rotation is the radius of the circle