A particle of matter contains six protons, seven neutrons, and six electrons. This particle must be a 1. neutral carbon atom
2. neutral nitrogen atom
3. positively charged carbon ion
4. positively charged nitrogen ion

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.

answer seismograph;

answer7,570,82356 cubic centimeters;