Question

707. Вы узнаете о Каспийском море, выполнив вычисления: 1) (-101,1 + 84,85) :(-22,81 + 23,06) :(-0,2) — столько процен- тов составляет соленость Каспийского моря; 2) (-2,5 + 8,1) · (1,24 – 7,79) + 126,68 такой процент миро- вых запасов осетровых рыб находится в Каспийском море; 3) (12 908,6 + 966,9) : (11,813 + 15,938) — из стольких видов растений состоят природные ресурсы Каспийского моря; 4) 312: (24,89 - 26,14) + 1103,6 столько видов рыб содержат природные ресурсы Каспийского моря.​

Answer 1

Ответ:

1)13%

2)90%

3)500

4)852

Answer 2

Calculation 1: Salinity of the Caspian Sea

To calculate the salinity of the Caspian Sea, we need to perform the following calculation:

(-101.1 + 84.85) / (-22.81 + 23.06) / (-0.2)

Let's calculate it step by step:

1. (-101.1 + 84.85) = -16.25 2. (-22.81 + 23.06) = 0.25 3. -16.25 / 0.25 = -65

Therefore, the salinity of the Caspian Sea is -65.

Calculation 2: Percentage of Sturgeon Fish in the Caspian Sea

To calculate the percentage of sturgeon fish in the Caspian Sea, we need to perform the following calculation:

(-2.5 + 8.1) * (1.24 - 7.79) + 126.68

Let's calculate it step by step:

1. (-2.5 + 8.1) = 5.6 2. (1.24 - 7.79) = -6.55 3. 5.6 * -6.55 = -36.68 4. -36.68 + 126.68 = 90

Therefore, 90% of the world's sturgeon fish reserves are located in the Caspian Sea.

Calculation 3: Number of Plant Species in the Caspian Sea

To calculate the number of plant species in the Caspian Sea, we need to perform the following calculation:

(12,908.6 + 966.9) / (11.813 + 15.938)

Let's calculate it step by step:

1. (12,908.6 + 966.9) = 13,875.5 2. (11.813 + 15.938) = 27.751 3. 13,875.5 / 27.751 = 500.15

Therefore, the natural resources of the Caspian Sea consist of approximately 500 species of plants.

Calculation 4: Number of Fish Species in the Caspian Sea

To calculate the number of fish species in the Caspian Sea, we need to perform the following calculation:

312 / (24.89 - 26.14) / 1103.6

Let's calculate it step by step:

1. (24.89 - 26.14) = -1.25 2. 312 / -1.25 = -249.6 3. -249.6 / 1103.6 = -0.23

Therefore, the natural resources of the Caspian Sea contain approximately 0.23 species of fish.

Please note that these calculations are based on the provided numbers and may not reflect the actual values.