An important result of the development of anesthesia was a decreased death rate from disease and accidents an increase in the number of amputations a decrease in the number of surgical procedures performed an increase in the need for health care

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