Please help this is from the book BSBT = Black Ships Before Troy chapter 8

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

What was the primary purpose of the sibley commission in georgia? to schools across georgia integrate peacefully to discover how georgians felt about the issue of integration to lead non-violent protests to elect new civil rights leaders

Why were the chang and xi rivers important to china’s development? a. they keep invaders out. c. they kept china isolated. b. they provided a route for ships to travel inland. d. they provided boundaries for the different political sections