Dr. John Snow combined maps with information in order to solve a problem in London. What goal was Dr. Snow trying to achieve? A. stopping the spread of a disease B. preventing crime C. mapping the locations of stores D. working to prevent a natural disaster Please select the best answer from the choices provided A B C D

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.