Continuous compound interest with additional transactions

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The Sirius Cybernetics Corporation needs an additional $10 billion in its pension fund by 2030, assuming continuous compounding at a 10% annual growth rate. To meet this goal, the company must calculate its yearly contributions over 20 years. If the CFO opts for a more aggressive 12.5% growth rate instead, the required yearly contribution will differ significantly. The discussion emphasizes the impact of growth rate assumptions on financial planning and pension funding strategies. Accurate calculations are crucial for the company's long-term financial health.
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1. The accountants at HR office of the Sirius Cybernetics Corporation have determined that the company would need additional $10 billion in its pension fund account over and above the current projected amount at the end of year 2030.

(a) Assuming the fund's balance will be growing, compounds continuously, at a rate of 10% a year, and the company will make regular contribution in 20 equal yearly installments over the 20-year period. How much is the company's yearly contribution?

(b) Not wanting to pony up the amount found in (a), the CFO of the company decides to "manage" (using a classic, but legal, way of gaming the accounting system in order to lower short-term expenses and, therefore, increase currently reported profit) the pension accounting by assuming a more aggressive 12.5% projected yearly growth rate, rather than 10%. How much is the company's would-be yearly outlay under the new growth assumption? Hint: In each case, solve the IVP with P(0) = $0; and then use P(20) = $10 billion to solve for the yearly contribution.

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