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Find the original amount invested if a flat rate of \(6\pourcent\) per year produces \(\dollar 720\) interest in 4 years (
calculatrice
!
e
\(\pi\)
(
)
%
AC
sin
cos
tan
7
8
9
/
\(\sin^{-1}\)
\(\cos^{-1}\)
\(\tan^{-1}\)
4
5
6
*
\(x^2\)
\(\sqrt{\phantom{2}}\)
x
y
1
2
3
-
ln
exp
log
0
.
=
+
).
7
8
9
4
5
6
1
2
3
C
0
.
dollars
Exit