A scientist determined that a rock sample contained 1500 g of uranium-235 and that the isotope had decayed for 2.0 half-lives. How much U-235 is left in the sample?

What are three voluntary behaviors that is not controlled by results

Why do all market economies have taxes to support armed forces police forces public schools and at least some form of public transportation?

1. how did conditions in germany and europe at the end of world war i contribute to the rise and triumph of nazism in germany? 2. how did the german government under nazi rule build support among the german people? 3. how did nazi germany gradually isolate, segregate, impoverish, and incarcerate jews and persecute other perceived enemies of the state between 1933 and 1939? 4. how did the nazis lead germany to war in europe and, with their collaborators, kill millions—including systematically murdering six million jewish people? 5. why is learning about the holocaust important? so we don’t repeat history.