Question

Составь выражения: собака погналась за бабочкой когда расстояние между ними было a метров.скорость собаки m м/с а скорость бабочки n м/с (m больше чем n ) а)на каком расстоянии от бабочки будет собака через 8 сек после начала движения? б)через какое время собака догонит бабочку? срочно надо!!!!!!!

Answer 1

1) S = a - 8 * (m - n)

2) T = a / (m - n)

Answer 2

Problem Analysis

We are given the following information: - The dog starts chasing the butterfly when the distance between them is a meters. - The speed of the dog is m m/s, and the speed of the butterfly is n m/s (where m > n).

We need to find: a) The distance between the dog and the butterfly after 8 seconds. b) The time it takes for the dog to catch up to the butterfly.

To solve this problem, we can use the formula: distance = speed × time.

Solution

a) To find the distance between the dog and the butterfly after 8 seconds, we can use the formula distance = speed × time. The time is given as 8 seconds, and the speed of the dog is m m/s. Therefore, the distance between the dog and the butterfly after 8 seconds is 8m meters.

b) To find the time it takes for the dog to catch up to the butterfly, we can set up an equation using the formula distance = speed × time. Let's assume it takes t seconds for the dog to catch up to the butterfly. The distance traveled by the dog in t seconds is mt meters, and the distance traveled by the butterfly in t seconds is nt meters. Since the dog catches up to the butterfly, the distances traveled by both are equal. Therefore, we can set up the equation mt = nt and solve for t.

Dividing both sides of the equation by n, we get t = m/n.

Therefore, the time it takes for the dog to catch up to the butterfly is m/n seconds.

Answer

a) The distance between the dog and the butterfly after 8 seconds is 8m meters. b) The time it takes for the dog to catch up to the butterfly is m/n seconds.

Please let me know if I can help you with anything else.