200(x"2)=60
!
Question
9
7
out
of
7
points
Five
years
ago,
when
the
relevant
cost
index
was
120,
a
nuclear
centrifuge
cost
$30,126.
The
centrifuge
had
a
capacity
of
separating
1500
gallons
of
ionized
solution
per
hour.
Today,
it
is
desired
to
build
a
centrifuge
with
capacity
of
5000
gallons
per
hour,
but
the
cost
index
is
now
360.
Assuming
a
power-sizing
exponent
to
reflect
economies
of
scale,
x,
of
0.75,
determine
the
approximate
cost
of
the
new
reactor.
Selected
Answer:
©222,957.3
5
Correct
Answer:
©222,932
+
3%
30126*(360/120)=903
78
90378*(5000/1500)".
75=ans
!
Question
10
6
out
of
6
points
A
student
is
borrowing
$1,170
per
year
for
3
years.
The
loan
will
be
repaid
2
years
later
at
a
15%
interest
rate.
Compute
how
much
will
be
repaid.
Selected
Answer:
©5,373.09
Correct
Answer:
©5,370
=
3%
1170(P/A,15%,3)*(F/P,15%,
5)=ans
!
Question
11
12
out
of
15
points
Select
among
the
following
the
statements
that
are
principles
of
engineering
economy.
Selected
&
