Math Problem Statement
Two years ago, you invested $3,150. Today, it is worth $3,900. What rate of interest did you earn?
Multiple Choice
11.27%
5.20%
.94%
5.64%
4.20%
Solution
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Math Problem Analysis
Mathematical Concepts
Compound Interest
Algebra
Formulas
A = P(1 + r)^t
r = (A/P)^(1/t) - 1
Theorems
Compound Interest Formula
Suitable Grade Level
Grades 9-12
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