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HP HP-25 - Page 68

HP HP-25
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Solution:
Press
Display
8.25
8.25
105K
=
Tt
6.23
Rating
on
Richter
scale.
Example
2:
Ace
explorer
Jason
Quarmorte
is
using
an
ordinary
barometer
as
an
altimeter.
After
measuring
the
sea
level
pres-
sure
(30
inches
of
mercury)
he
climbs
until
the
barometer
indi-
cates
9.4
inches
of
mercury.
Although
the
exact
relationship
of
pressure
and
altitude
is
a
function
of
many
factors,
Quarmorte
knows
that
an
approximation
is
given
by
the
formula:
.
30 30
Altitude
(feet)
=
25,000
/n
————
=
25,000
/n
Pressure
9.
Where
is
Jason
Quarmorte?
Solution:
Press
Display
30
ENED
9.4
0
)
25000
Altitude
in feet.
Quarmorte
is
probably
near
the
summit
of
Mount
Everest
(29,028
ft).
Raising
Numbers
to
Powers
B
permits
you
to raise
a
positive
number
(either
an
integer
or
a
decimal)
to
any
power.
For
example,
calculate
29
(i.e.,
2
X
2X2X2X2X2X2X2X2).
Press
Display
2
]
1
|
512.00
Now
find
812567,
Press
Display
8
8.00
12567
7]
[o0.07
In
conjunction
with
,00
O]
provides
a
simple
way
to
extract
roots.
For
example,
find
the
cube
root
of
5
(This
is
equivalent
to
5").
.

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