#### Answer

A.:
0
960
5350
B: The solutions show how much income tax is owed for each given income bracket.

#### Work Step by Step

A:
The given inequalities tell you which functions to use for each given value.
T(5000)=0
T(12000)=0.08(12000)=960
T(25000)=1600+0.15(25000)=5350
B. Examining the context given in the problem, you can read that the function determines how much income tax is owed according to given intervals of income.