Ecologists investigated the population density of Daphnia (water fleas) in a rectangular experimental breeding trough.
They collected five sample volumes of 1 dm3 each from different zones of the trough, filtered out the Daphnia, and counted them. The results are shown in the table below:
| Sample number | Number of Daphnia in 1 dm3 of water |
|---|---|
| 1 | 34 |
| 2 | 12 |
| 3 | 41 |
| 4 | 28 |
| 5 | 15 |
Calculate the mean number of Daphnia in 1 m3 of trough water, given that 1 m3=1000 dm31\text{ m}^3 = 1000\text{ dm}^31 m3=1000 dm3.
The trough has a rectangular volume with the following measurements:
Calculate the estimated total number of Daphnia in the entire trough. Give your final answer in standard form.