Материальная точка движется прямолинейно по закону х(t) =1/3t3-4t2+19t-11, где x – расстояние от точки отсчета в метрах, t – время в секундах, измеренное с начала движения. В какой момент времени ее скорость была равна 3м/с?

1. In child i love to explore the coastal terrytory in search of beatiful secluded beaches. 2. She sees no reason to go on a trip a burning heart. 3. Roger waved until the car was out of sight. 4. Previously , vy sister worked at home, but when there was a surge tourism she took a leading travel company. 5. Altouth he was not a accustumed to dine in outdoor cafes, now they often have to do it. 6. It was hard to get used to the appearance of this incredible with deaby eyes. 7. We have lost sight of the dog, when  she run to the border area. 8. We had never walked on a pabble beach, on a next to which a huge rise peacked limestno cliffs. 9. Local authorities intend to take measures to improve the situation with traffic jams in the city. 10. Not all beleive in love at first sight.

1. As a child I loved to explore the coastal territory in search of beautiful secluded beaches. 2, she sees no reason to go on in such zhuchy Excursion of 3. Roger waved until the car was out of sight. 4. Previously, my sister worked at home, but when there was a surge (Height) tourism, it company. 5. Although he was not accustomed to dine in outdoor cafes now they often have to do it 6. It was hard to get used to the appearance of this incredible animal with beady eyes. ran to the border area. 8. We had never walked on a pebble beach near which rise izvestnakovye huge spiky rocks. 9. Local authorities intend to take meP to improve the situation with the city traffic jams. 10.Nevse believe in love at first sight.