PreAlgebra
posted by TiffanyJ .
Find each product or quotient. express using exponents
4. Neutral water has a pH of 7. Each oneunit decrease i the pH means that the solution is 10 times more acidic. How much more acidic vinegar is than baking soda if vinegar has a ph of 3 and baking soda has a ph of 9? I think the answer is 10 to the 6th power but I don't know how to write out my work.

vinegar  pH 3
baking soda  pH 9
9  3 = 6 units diff.
10 x 6 = 60x as acidic
10^6 = 1 million, so I can't see how that is right
10^1.77815 = 60
or, 6 x 10^1 = 60
is this a prealgebra question or science? 
its my prealgebra homework

3/5.2/3