I need an answer rn pl hel 5. The combustion of fuel oil to heat a home is an example of alan

O A. endothermic reaction.
O B. substitution reaction.
O C. exothermic reaction.
O D. metathesis reaction.

a chemical reaction happens

explanation:

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

the answer to this question is 3.