a
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2
1
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/ proportionality
1 exercises (100% corrected)
a
1.
Unclassifie
d
financial
ye
ars
E.2075
Definition
:
Capital
is
in
v
ested
at
comp
ound
in
terest
when
the
in
terest
from
eac
h
p
erio
d
is
added
to
the
capi-
tal
to
gradually
increase
it
and
earn
in
terest
on
the
whole
amoun
t.
Source
:
Wikip
edia.org
1
Capital
of
2
000
e
is
in
v
ested
at
a
mon
thly
comp
ound
in
terest
rate
of
0
;
7
%
.
a
What
is
the
v
alue
after
one
mon
th?
After
t
w
o
mon
ths?
b
What
is
the
v
alue
after
n
mon
ths?
c
What
is
the
rate
of
return
on
the
capital
after
one
y
ear?
2
a
Giv
e
a
decimal
v
alue
rounded
to
10
−
5
of
the
real
n
um
b
er
t
1
suc
h
that
:
(1
+
t
1
)
12
=
1
;
12
F
or
an
ann
ual
in
v
estmen
t
at
a
rate
of
12
%
,
t
1
is
the
equiv
alen
t
mon
thly
rate.
b
A
bank
adv
ertisemen
t
states
:
F
or
an
in
v
estmen
t
of
1
000
e
o
v
er
one
y
ear
at
com-
p
ound
in
terest
:
for
the
first
t
w
o
mon
ths,
the
rate
applied
is
an
ann
ual
rate
of
12
%
;
for
the
last
ten
mon
ths,
the
rate
applied
is
an
ann
ual
rate
of
3
%
.‘’.
When
c
ho
osing
this
in
v
estmen
t
form
ula,
determine
the
rate
of
return
on
the
capital
o
v
er
one
y
ear.
h
ttps:/
/c
hingmath.fr
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