6. you have 45 years left until retirement and want to retire with $4 million. your salary is paid annually, and you will receive $50,000 at the end of the current year. your salary will increase at 3 percent per year, and you can earn an annual return of 9 percent on the money you invest. if you save a constant percentage of your salary, what percentage of your salary must you save each year?

Instructions are listed below.

Explanation:

Giving the following information:

You have 45 years left until retirement and want to retire with $4 million. Your salary is paid annually, and you will receive $50,000 at the end of the current year. Your salary will increase at 3 percent per year, and you can earn an annual return of 9 percent on the money you invest.

n= 45

FV= 4,000,000

i= 9% + 3%= 12%

We need to use the following formula:

FV= {A*[(1+i)^n-1]}/i

A= annual deposit

Isolating A:

A= (FV*i)/{[(1+i)^n]-1}

A= (4,000,000*0.12)/{(1.12^45)-1}= $2,945

5.89% per year.

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.'