Please someone end my suffering
Surface Area​

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.

Atown has a population of 7000 and grows at 3% every year. to the nearest year, how long will it be until the population will reach 12400?