What are the domain and range of the function f(X) = 5^x-3+1? domain: all real numbers greater than 1
range: all real numbers

domain: all real numbers
range: all real numbers areater than 0

domain: all real numbers
range: all real numbers greater than 1

domain: all real numbers greater than 5
range: all real numbers greater than 1

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?