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What is the most abundant element in the interstellar medium?
Deferred Annuity
An insurance contract designed to generate regular payments starting at a future date, often used as a retirement investment.
Quarterly Payment
Regular payments made every three months on a loan or investment.
Compounded Semi-annually
The process of adding interest to the principal sum of a loan or deposit, where the interest is added twice a year.
Perpetuity
A type of annuity that continues indefinitely, making regular payments for an infinite amount of time.
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