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HP 46 User Manual

HP 46
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Logarithms
7
The
HP-46
calculates
natural
logs,
common
logs,
and
antilogs.
{\LJ
This
key
calculates
the
natural
log
(to
the
base
e)
of
x.
.+
This
key
raises
e
(2.718...)
to
the
power
in
X.
This
is
called
the
natural
antilog
and
it is
used
in
conjunction
with
the
N
key.
B
K
LNJ
Pressing
this
key
sequence
takes
the
log
to
the base
10
of
x.
_
Pressing
this
key
sequence
raises
10
to
the
power
in
X. This
w
is
called
the
common
antilog
and
it
is
used
in
conjunction
with
the
=m
keys.
LOG
EXAMPLES
A.
Suppose
you
wish
to
use
an
ordinary
barometer
as
an
altimeter.
After
measuring
the
sea
level
pressure
(30
inches
of
mercury)
you
climb
until
the
barometer
indicates
9.4
inches
of
mercury.
How
high
are
you?
Solution:
Although
the
exact
relationship
of
pressure
and
alti-
tude
is
a
function
of
many
factors,
a
reasonable
approximation
is
given
by:
30
Altitude
(feet)
=
25,000
In
30
=
25,000
In
94
Pressure
'
25000400
+
Press:
25000
I
30
9.40
+
30,00
t
9.4
(=)
oMm—4zZm
IMAzZm
-“z-270
29012.19
o
(We
suspect
you
are
on
Mt.
Everest.)
31

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HP 46 Specifications

General IconGeneral
BrandHP
Model46
CategoryCalculator
LanguageEnglish

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