Answer:
c. 50 percent
Step-by-step explanation:
The amount of tax to paid by Tim on the second income he earned during the year shall be calculated as follow:
Amount of tax on 2nd income=21,000-(20%*30,000)
=21,000- 6,000
=$15,000
Marginal tax rate on 2nd income=Amount of tax on 2nd income/2nd income earned during year
Marginal tax rate=15,000/30,000=50%
So the answer is c. 50 percent