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C
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⌫
π
e
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\(\div\)
\(\sqrt{\,}\)
\(a^{b}\)
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\(\times\)
\(\frac{a}{b}\)
ln
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cos
cos⁻¹
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sin
sin⁻¹
←
→
!
tan
tan⁻¹
Find the original amount invested if a flat rate of \(6\pourcent\) per year produces \(\dollar 720\) interest in 4 years.
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dollars
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