Why is it difficult for the federal government to increase or decrease spending? A. Most goverment officials are reluctant to authorize any changes in spending.
B. Two-thirds of all government spending is on entitlements, which the government cannot easily alter.
C. Taxpayers and citizens get upset when the government decides to stop paying for something.
D. Different states may have different goals, so they may not agree with the monetary changes.

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.