Practice using your ideas: Is it reasonable to assume that if you start with 10 atoms ofPolonium, that 0. 5s later only 5 will remain? What if you start with 500 atoms? Explain

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

the higher the current the higher the mag field around it the higher the influence on the compass