типография в течение трёх месяцев выпускала по 13428 книг ежемесячно,а течение 4-х месяцев- по 18271  книге ежемесячно.Сколько книг типография выпустила за всё это время?

Пуля, вылетев из ствола пистолета вертикально вверх, поднялась на высоту 2000м.

Какова начальная скорость и время подъема?

Сопротивление воздуха не учитывать.

Read the stori and say why Henry's parents were a little sad.

                                                  Henry

  Henry had no brothers and no sisters. "I want a brother," he told his parents. "Sorri," they said.

  Henry had no friends in his street. "I wans to live in a different street," he told  his parents. "Sorrry," they said.

  Henry had no pets at home. "Iwant to have a dog," he told his parents. "Sorri,"  they almost said.

  But first they looked at their house with no brothers and sisters. They looked at  their street with no children. Then they looked at Henry's face. Then they looked at each other.

  "Okay," they said.

  "I want to hug you!" Henry told his parents. And he did. 

Пожалуйста, помогите решить задачу.Из одной и той же точки шоссе в противоположных направлениях выехали два велосипедиста, один со скоростью 12км/ч, а другой со скоростью 14 км/ч. Первый велосипедист выехал на час раньше второго.Через сколько времени после выезда первого велосипедиста расстояние между велосипедистами будет равно 64 км?