$1.$ If you hear thunder $5$ seconds after seeing the lightning bolt it comes from, roughly how far away from you is the lightning bolt? Take the speed of sound to be $343$ m$/$s$.($Do not trust the old wives$$ tell about this$).$ a$)1$ mile b$)2$ miles c$)2\mathrm{.}5$ miles d$)5$ miles e$)10$ miles