When Alice started working, she has decided to deposit $250 a pay check into a savings account that earns an interest of 1% per month. She gets paid on the last day of every month. Which of the following expression may be used to determine the account value 10 years from now? a. F= [250/0.01] (F/P, 1%, 60)
b. F = 250[(P/A, 1%, 120) (F/P, 12%, 5)]
c. F= 250(F/A, 1%, 120)
d. F = [3,000(P/A, 12%, 10)] [(F/P, 12%, 10)]

The correct option is c. F= 250(F/A, 1%, 120).

Explanation:

Since she gets paid on the last day of every month, implies we are to the determine the future value (F) of an ordinary annuity. Therefore, the original expression for the future value (F) of an ordinary annuity is as follows:

F= A(F/A, i, n) …………………. (1)

Where:

F = Future value

A = Periodic or monthly amount = $250

F/A = Convert A to F

i = monthly interest rate = 1%

n = number of months = Number of years * number of months in a year = 10 * 12 = 120

Substituting the values into equation (1) except F/A, we have:

F= 250(F/A, 1%, 120) …………………… (1)

Therefore, the correct option is c. F= 250(F/A, 1%, 120).

Note:

Note that inputting equation into a scientific calculator will give the following future value (F):

F = $57,509.67

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.'