May 15th, 2006

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из экзаменационных работ

1)If the toy rocket fired straight into air has height of S(t)=-16t2 + 400t feet after t seconds, it will take another (same) t seconds to hit the ground. This is because the gratitude will not change while the toy is fired into air or when it falls to the ground.

2)The signal "-" doesn't mean the negative number, it means the negative direction of the positive direction.
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вопрос

Не едет ли кто в Москву, надо бы отвезти приглашение? Оно у меня будет в руках во вторник.