SOLUTION: I have two questions to ask. 1. what annual rate of interest is required to triple an investment in 8 years? 2.Solve 4(7-3x)=(1/16)

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Question 473390: I have two questions to ask.
1. what annual rate of interest is required to triple an investment in 8 years?
2.Solve 4(7-3x)=(1/16)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1. what annual rate of interest is required to triple an investment in 8 years?
Question: Under what kind of compounding?
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2. Solve
4(7-3x)=(1/16)
(7-3x) = 1/64
2x = 7-1/64
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2x = (7*64-1)/64
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2x = 447/64
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x = 447/128
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x = 3.4922
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Cheers,
Stan H.
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