What is the ratio is the specific air fule ratio for combustionthe ratio is the specific air-fuel ratio (by weight) of atmospheric air to fuel at which the most efficient and complete combustion occurs

stoichiometric

Explanation:

In a combustion process air and fuel is needed. The ratio of air and fuel during a combustion process is called air-fuel ratio. If the ratio of air and fuel is such that the fuel is completely burned it is known as  the stoichiometric ratio.

If the ratio is lower than this ratio it is known as a rich mixture and lean mixture vice-versa.

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.