5,9x - 5,21 = 9,54  Помогите пожалуйста!

какое значение для народного хозяйства имеет селекция микроорганизмов? приведите примеры промышленного получения и использования продуктов жизнедеятельности микроорганизмов. Что такое биотехнология? Что такое генная инженерия?

Linda's father is walking down the corridor. When he is passing the bathroom he hears his daughter talking to somebody in kind voice.  The door of the bathroom is open. The father is surprised and lookes in. He sees his daughter holding the cat in her arms and cleaning its teeth with his toothbrush. Linda doesn't see her father and continues her cleaning. Linda's father call his wife. Linda's mother comes in and lets the cat go. But the little girl says : Why? I'm sure Daddy needn't make such a fuss  about it because it isn't the first time I cleaned the cat's teeth with that toothbrush. ПОМОГИТЕ С ПЕРЕВОДОМ ПОЖАЛУЙСТА!

зачем семена растениям?