Campbell, a single taxpayer, earns $400,000 in taxable income and $2,000 in interest from an investment in State of New York bonds. (Use the U. S. tax rate schedule). Required: If Campbell earns an additional $15,000 of taxable income, what is her marginal tax rate on this income

35%

Explanation:

First and foremost, we've to calculate the amount that will be taxed on $400000 which will be:

= $46628.50 + ($400000-$204100) × 35%

= $46628.50 + ($400000-$204100) × 0.35

= $46628.50 + $68565

= $115193.5

When earns an additional $15,000 of taxable income, this means her total taxable income will be:

= $400,000 + $15,000

= $415000

Therefore, the tax amount on $415000 will be:

= $46628.5 + ($415000 - $204100) × 35%

= $46628.5 + ($415000 - $204100) × 0.35

= $120443.5

Marginal Tax rate will then be calculated as:

= change in Tax / change in Taxable income

= ($120443.5 - $115193.5) / ($415000 - $400000)

= $5250 / $15000

= 35%

answer: tell me how

explanation:

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'