Posted by Matt on Thursday, January 10, 2013 at 6:24am.
IF Tony earned $600 after investing $3,000 for five years, what was his interest rate?

Algebra  fruit, Thursday, January 10, 2013 at 8:11am
I=prt
600=300(r)(5)
600= 1500r
600/1500=r

Algebra  Reiny, Thursday, January 10, 2013 at 8:44am
fruit used "simple interest"
But for a five year period it is more likely that compound interest would be used
3600 = 3000(1+i)^5
1.2 = (1+i)^5
take the 5th root
1+i = 1.2^(1/5) = 1.037..
i = .037
or 3.7%
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