mark and he are thirteen years old.and they are very sportly. they often go to the gym - at least three times a week. mark does exercises to make his arms strong. he can't walk because of a car accident, so he goes everywhere in wheelchair. but it doesn't stop him doing the things that boys his age want to do.
Ответ дал: Гость
9+11+15=35 учеников - решили стать зоологами. 70: 35=2 детеныша - опекает каждый зоолог. 2*9=18 детенышей - заботятся зоологи 3а класса. 2*11=22 детеныша - заботятся зоологи 3б класса. 2*15=30 детенышей - заботятся зоологи 3в класса.
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