If the pile contains only 15 quarters but at least 30 of each other kind of coin, how many collections of 30 coins can be chosen
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Mr. and Mrs. Bailey need to invest $2906.50 so as to send their son to college.
<h3>Compound interest</h3>Compound interest is given by:
where A is the amount after t years, P is initial amount, r is the rate and n is the times compounded per period
Given that n = 1, r = 9% = 0.09, A = $7500 t = 11. Hence:
Mr. and Mrs. Bailey need to invest $2906.50 so as to send their son to college.
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