Standard of living can generally be measured by which of the following : * having a good job, lots of friends, and food to eat
the amount of "Material" stuff one can accumulate during their lifetime
having healthcare, but no stable job and lack of food and water and friends
having a good job, access to healthcare, enough food and water, and friends

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