Sibal started with $500 in a bank account that does not earn interest. In the middle of every month, she withdraws 1/5 of the account balance.

Which recursive function rule models Sibal's balance at the end of each month?

Question

Selina Pena

Mathematics

11 February, 22:20

Sibal started with $500 in a bank account that does not earn interest. In the middle of every month, she withdraws 1/5 of the account balance.

Which recursive function rule models Sibal's balance at the end of each month?

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Answers (1)

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Irvin Arias · Answer 1

4/5 of the original amount at the start of the month will remain. The amount at the start of every month will change. Thus:

an = 4/5 (an-1); where a1 = 500.

Sibal started with $500 in a bank account that does not earn interest. In the middle of every month, she withdraws 1/5 of the account balance.Which recursive function rule models Sibal's balance at the end of each month?

Sibal started with $500 in a bank account that does not earn interest. In the middle of every month, she withdraws 1/5 of the account balance.

Which recursive function rule models Sibal's balance at the end of each month?