The density of gold is about is about how manytimes greater than the density of mercury explain

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

If i have 20$ and i gave 5$ away how much i got

Hurry if the population of of an ant hill doubles every 10 days and there are currently 100 ants living in the ant hill what will the ant population be in 20 days