a) How many years will it take for something costing $68 today to cost $90 if inflation averages 1.9% per year? Answer in years, rounded to one decimal place.
b) What is the future value of an annuity with annual cashflows of $8,000 for 20 years? The interest rate is 3.7%. Round to the nearest cent.
Part a:
$90 = $68 * (1 + 1.9%)n
1.323529 = 1.019n
Taking log of both sides,
LN(1.323529) = n * LN(1.019)
0.280302 = n * 0.018822
n = 14.9 months
b)
FV = 8000 * 28.86803
FV = $230,944.24
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