Even though I answered this question all I just want to make sure

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?