A helicopter, initially hovering 404040 feet above the ground, begins to gain altitude at a rate of 212121 feet per second. Which of the following functions represents the helicopter’s altitude above the ground yyy, in feet, ttt seconds after the helicopter begins to gain altitude?

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.