Arc ab is one-third of the circumference of a circle. what is the radian measure of the central angle? startfraction pi over 3 endfraction radians startfraction 2 pi over 3 endfraction radians startfraction 3 pi over 2 endfraction radians 3π radians

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.