Answer:
The amount needed in the retirement account is $707,025.
Explanation:
This problem is a case of annuity.
They plan to withdraw $ 75,000 annually from the end of the first year of retirement.
The formula that relates capital in the account to annual withdrawals is
[tex]C=A*D=A*(\frac{(1+i)^{n} -1}{i*(1+i)^{n}} )\\\\C=75,000*9.427=707,025[/tex]