Salt and water are mixed together in a bowl. the salt dissolves. the bowl of salty water is left out on the table. after a few days you know this that the water is gone in that the ball is covered in salt what can you conclude?

1) salt in water are an element

2) salt and water are a molecule

3) salt and water are a mixture

4)salt and water are a compound

its either 3 or 4 kid

Explanation:

i dont think i need to say why T^T

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.