Scientific notation

1. 0,000034
2. 0,0054
3. 346574
4. 0,00125
5. 348954

Could someone . i have tried to solve myself but my calculation is off

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Acold front traveling southeast collided with a warm front traveling northwest the following map shows the weather on monday the day the two fronts collided which of these describes the weather forecast for mississippi on tuesday and wednesday