Give the domain and range of this graph

the domain is:
the range is:

Is a positive integer raised to a negative power always positive

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?