What does the law of conservation of mass state? Question 1 options:

Mass cannot be created or destroyed in a chemical reaction

Mass can be created but not destroyed in a chemical reaction.

Mass can be destroyed but not created during a chemical reaction.

Mass can be created and destroyed during a chemical reaction.

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.

i think   the answer is c hope i'm right

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds