A student pores to substances together in a closed beaker the student notices that there is a color change and gas bubbles are formed the student determines that a chemical reaction has occurred which statement is true about this chemical reaction if it is done in a completely closed system?mom

i'm assuming that it's c.) red bank..

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.

c. 75.7

i think that is the right