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charle [14.2K]
3 years ago
7

On your tenth birthday, you received 500 which you invested at 9.5% interest, compounded annually. your investment is worth $250

0. how old are you today?
Mathematics
1 answer:
igomit [66]3 years ago
6 0
Compounded once a year: A=P(1+r)^t
2500=500(1+0.095)^t
1.095^t=5
because the unknown number is an exponent, use log to find the unknown:
log(1.095^t)=log5
tlog1.095=log5
t=log5/log1.095
use your calculator, t=17.734
so this person is about 28 years old.
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<h3>What is a ratio?</h3>

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From the graph, we have:

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Read 2 more answers
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