6.9 is how many kilometers

If you mean 6.9 miles the it is 11.1045 kilometers. You can round it to the tenth place to get 11.1

answer; /// the above statement is (true);

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."