Iven: klmn is a trapezoid m∠n = m∠kml me ⊥ kn , me = 3 sqrt 5 , ke = 8, lm kn = 3/5 find: km, lm, kn, area of klmn

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?