How to find the ratio of shortest side of triangle to longest

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

Ill mark the brainliest if you me with the these three questions 7,8,9

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?