Each hardiness zone differs by 10 degrees F, so the difference in low winter temperatures between zones 6 and 7 is 10 degrees; between zones 6 and 8, 20 degrees; between zones 6 and 9, 30 degrees, and so on.
The median annual Dentist salary is $143,918, as of July 29, 2016, with a range usually between $128,516-$168,271, however this can vary widely depending on a variety of factors.
According to the ADA there are over 157,000 dentists in private practice earning an average net salary just over $180,000 per year as of 2011. Over half of all the dentists are self-employed or in a private practice setting. The US Bureau of Labor tracks 93,500 dentists as employed.ccording to the ADA there are over 157,000 dentists in private practice earning an average net salary just over $180,000 per year as of 2011. Over half of all the dentists are self-employed or in a private practice setting. The US Bureau of Labor tracks 93,500 dentists as employed.