a)
f(3.8)=1.36
f(5)=1.58
where f(x) represents the retail flat rate in dollars and x is the number of ounces
b)
The domain of the function is the set of all possible values of x in this case
[tex](0,5\rbrack[/tex]
The range of the function is the set of all possible values the function can have
[tex]\lbrace0.70,0.92,1.14,1.36,1.58\}[/tex]
