Good conclusion on why we should save water and have water saving features in our houses

What acceleration is produced when a 3,000-n force acts on a 1,200-kg car? ignore the friction

Does anyone know the answers for these

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation