Question

СРОЧНО! ДАМ 50 БАЛЛОВ! Як змінилася температура повітря, якщо вона: а) спочатку збільшилася на 25%, а потім зменшилася на 40%? б) спочатку зменшилася на 60%, а потім збільшилася на 80%?

Answer 1

Ответ:

Пошаговое объяснение:

Температура  = x

x*1.25=1.25x

1.25x-1.25x*0.4=1.25x - 0.5x=0.75x

x - x*0.6 = 0.4x

0,4x+0.4x*0.8=0.4x+0,32x=0.72x

Answer 2

Calculation of Temperature Changes

To calculate the temperature changes, we will use the given percentages and assume that the initial temperature is 100 degrees.

a) If the temperature initially increases by 25% and then decreases by 40%: - Step 1: Increase the temperature by 25%: 100 + (25% of 100) = 100 + 25 = 125 degrees. - Step 2: Decrease the temperature by 40%: 125 - (40% of 125) = 125 - 50 = 75 degrees.

b) If the temperature initially decreases by 60% and then increases by 80%: - Step 1: Decrease the temperature by 60%: 100 - (60% of 100) = 100 - 60 = 40 degrees. - Step 2: Increase the temperature by 80%: 40 + (80% of 40) = 40 + 32 = 72 degrees.

Therefore, the temperature changes are as follows: a) The temperature initially increases by 25% and then decreases by 40%, resulting in a final temperature of 75 degrees. b) The temperature initially decreases by 60% and then increases by 80%, resulting in a final temperature of 72 degrees.

Please let me know if there's anything else I can help you with!