Answer: 4075 dollars
Explanation:
10% of $8500 = 0.10*8500 = 850
For the first $8500 she made, she pays $850 in tax.
The remaining amount over 8500 is then taxed at 15%
30,000 - 8,500 = 21,500
So the remaining $21,500 she earned is taxed at the higher bracket of 15%
15% of 21500 = 0.15*21500 = 3225
She has to pay an additional $3225 in tax.
The total tax bill comes to 850+3225 = 4075 dollars
This is an effective rate of 4075/30000 = 0.1358 = 13.58% roughly.
