does using toothpast with baking soda make my teeth whiter than toothpaste without baking soda? What’s the independent variable and what’s the dependent variable. Also the constant?

Yes using toothpaste and backing soda is whiting because Toothpaste by itself has whiting products in it which eat plaque off your enamel.

Explanation:

Unlike backing

soda it has an acid that cleans surfaces almost like bleach but safe enough to us on your teeth.

Don't use bleach on teeth it an kill you.

b.

explanation:

3. dark matter

empty space could also be a simple vacuum