Simple Algebra - solving for R

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January 18th 2011, 10:14 AM
killasnake

Simple Algebra - solving for R

Its been awhile since I took a math class, I was reviewing this question but I do not understand where the $4$ came from. I understand the rest but I am clueless about that $4$

$4000=1000$ x $(1+r)^5$
$(1+r)^5=4$
$(1+r)=4.0$ ^(1/5) $=1.32$
$r=.32$

This came from my math book.
January 18th 2011, 10:25 AM
Quacky

Quote:

Originally Posted by killasnake

Its been awhile since I took a math class, I was reviewing this question but I do not understand where the $4$ came from. I understand the rest but I am clueless about that $4$

$4000=1000$ x $(1+r)^5$
Divide both sides of the equation by 1000.
$(1+r)^5=4$
$(1+r)=4.0$ ^(1/5) $=1.32$
$r=.32$

This came from my math book.

~Quacky.
January 18th 2011, 11:29 AM
Wilmer

If ab = x, then a = x/b OR b = x/a (ab means a times b)

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