Answer:
His yearly gross income is $16.000.
Step-by-step explanation:
Your friend's job pays $ 10 per hour and he works 40 hours per week:
$10 per hour * 40 hours working in the week = $400 per week
If he works 50 weeks of the year:
$400 per week * 50 weeks working per year = $20,000 per year.
The tax rate is the percentage of taxes paid to the law by the company on its income.
If you earn $20,000 a year, and if the tax rate is 20% the tax generated is $ 4000.
So, $20,000 a year - $4000 of the tax rate = $ 16,000 a year.