What led to a change in the number of officially classified planets in 2006? Scientists determined that some inner planets are too small to be considered spherical. Scientists determined that Pluto does not orbit a star. Scientists determined that the dwarf planet Eris should be included. Scientists determined that Pluto does not clear its orbit of other objects.

the answer is the first option

explanation:

just googled it m8. not that hard

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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.

1. they vary with a higher number because boiling is way hotter than melting

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.