A student investigated a freshwater pond ecosystem and estimated the population size and mean biomass of different organisms.
| Organism | Number | Mean biomass of each organism in grams | Biomass of population in grams |
|---|---|---|---|
| Pond weed | 120 | 50.0 | 6000 |
| Water snails | 450 | 1.8 | 810 |
| Minnows | 150 | 3.6 | ? |
| Great diving beetles | 40 | 2.5 | 100 |
| Heron | 1 | 1500 | 1500 |
Calculate the biomass of the population of minnows in the pond.
