Question

Ракета подброшена вертикально вверх. Высота ракеты вычисляется по формуле h = -5(1 + 2)(t - 8) где - высота мяча в метрах, 1 - время в секундах, прошедшее после броска. Сколько секунд ракета будет находиться на высоте не менее 105 м?​

Answer 1

Ответ:

4 секунды

Объяснение:

Answer 2

To find the time the rocket will be at a height of at least 105 meters, we can use the given formula:

h = -5(1 + 2)(t - 8)

where: - h is the height of the rocket in meters, - t is the time in seconds since the rocket was launched.

We need to find the value of t when h is equal to or greater than 105 meters.

Let's solve the equation step by step:

1. Substitute h = 105 into the equation: 105 = -5(1 + 2)(t - 8)

2. Simplify the equation: 105 = -15(t - 8)

3. Divide both sides of the equation by -15 to isolate (t - 8): 105 / -15 = t - 8

4. Simplify the left side of the equation: -7 = t - 8

5. Add 8 to both sides of the equation to isolate t: -7 + 8 = t 1 = t

Therefore, the rocket will be at a height of at least 105 meters for 1 second after it is launched.

Please note that the given formula assumes the rocket is launched vertically upwards and does not take into account factors such as air resistance or the effects of gravity.