Question

Aaron withdraws $120 per month

from his savings account. His
account started with $6000.
Just type the number:
f (8 months) =
f (22 months) =
f (4 years) =
Khan
Type yes or no: the input is savings
dollars
dollars
dollars
Type yes or no: in one year the account will be at $4660
Type yes or no: it will take 50 months for the account to hit $0

Answer 1

Explanation:

To find f(8 months), we can use the formula:

f(n) = 6000 - 120n

Substituting n = 8, we get:

f(8) = 6000 - 120(8) = 5160

Therefore, f(8 months) is 5160.

To find f(22 months), we can again use the formula:

f(22) = 6000 - 120(22) = 3480

Therefore, f(22 months) is 3480.

To find f(4 years), we need to convert 4 years to months and then use the formula:

f(4 years) = f(48) = 6000 - 120(48) = 48

Therefore, f(4 years) is 48.

Answer to Khan's questions:

- Is the input in savings dollars? Yes, the initial account balance is given in dollars.

- Will the account be at $4660 in one year? No, we cannot determine this without additional information about the interest rate or other factors that may affect the account balance.

- Will it take 50 months for the account to hit $0? No, we cannot determine this without additional information about the interest rate or other factors that may affect the account balance.