si para envasar cierta cantidad de aceite de necesitan 8 barriles de 20 litros de capacidad cada uno ¿ cuántos barriles necesitaremos si la que tenemos son 5 litros de capacidad?​

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?