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.
Salary Outlook. Dentists are very well compensated for the services they provide. According to the BLS, dentists earned a median salary of $146,340 in 2013. The best-paid earned more than $187,999, while the lowest-paid earned less than $72,240.