In 1981, Reagan persuaded Congress to reduce the top tax rate form 70% to 50% and to index tax brackets (so that inflation was taken into consideration). In 1986, the Tax Reform Act reduced the rate on the wealthiest Americans to 28%.
Causes. Cavities are caused by tooth decay â a process that occurs over time. Here's how tooth decay develops: 1  Plaque forms. 2  Your mouth naturally contains many types of bacteria. 3  Some thrive on food and drinks that contain certain forms of sugar.
its actually pretty simple:cavities are caused by bits of food left in your teeth over night. the food form plaque, which turns into acids that drill a hole to your teeth. bas â¦ ically, the best way to avoid it is to floss and brush your teeth after each meal, and especially before you go to bed.-rays are also often useless in detecting decay on the surface of the tooth directly facing the x-ray. If you doubt your dentist, please get a second opinion. Its your right, and its your mouth! 1 person found this useful.