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Expert replies
by resilient » Sun May 25, 2008 7:33 am
A certain investment grows at an annual interest rate of 8%, compounded quarterly. Which of the following equations can be solved to find the number of years, x, that it would take for the investment to increase by a factor of 16?

a. 16 = (1.02)^x/4
b.2 = (1.02)^x
c.16 = (1.08)^4x
d.2 = (1.02)^x/4
e.1/16 = (1.02)^4x




qa isa


THis can be done by using the formula but its pretty time consuming and a lot of room for error. IS there an easier safer way to do this?
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Source: — Problem Solving |

by ksh » Sun May 25, 2008 7:46 am
Hi risilient,

It seems simple just plug in the values

for a compounding prob, let P be the Principal that becomes 16P in this case.
16P=P(1+.08/4)^x4, where x= no. of years
This gives us
16=(1.02)^x4
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by 4meonly » Sun Jan 25, 2009 3:53 am
ksh wrote:Hi risilient,

It seems simple just plug in the values

for a compounding prob, let P be the Principal that becomes 16P in this case.
16P=P(1+.08/4)^x4, where x= no. of years
This gives us
16=(1.02)^x4
But the answer is
a. 16 = (1.02)^x/4

Why x/4?
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by 4meonly » Sun Jan 25, 2009 9:07 am
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