An igneous rock that originally had 8000 atoms of a certain radioactive material when it was formed is found to now have only 250 atoms of that material left. If the half-life of the radioactive material is 2 million years, how old is the igneous rock

Which statement about factories in the industrial revolution is not true? a) some of the first advances were in textile mills b) spinning machines used water power c) water power was replaced by steam power d) coal was imported to english factories for power answer d) coal was imported to english factories for power