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64
Function Keys
Solution:
Press
Display
8.25miiE]
~
1
8~
.
2~
5
=~
I 05
a
[1Og]
~
1
2~
.
0~
2
=~
B
16.23
Rating
on
Richter scale.
Example 2: Ace explorer Jason Quarmorte is using an
ordinary
ba
rometer
as an
altimeter.
After
measuring
the
sea
level pres-
sure
(30 inches of mercury) he
climbs
until
the
barometer
indi-
ca
tes
9.4
inches of mercury
.
Although
the exact relationship of
pre ssure
and altitude
is
a
function of many factors
,
Qua
rmorte
knows that
an
approximation
is
given
by
the
formula:
30
30
Altitude (feet)
=
25,000
I n - - - -
=
25
000
tn--
Pressure
'
9.4
Where is
Jaso
n Quarmorte
?
Solution:
Press
301m1m
9.4
8
a
~
25000
o
Display
130.00
13.19
11.16
125000
.
129012.19
Altitude in
feet.
Quarmorte
is
probably near the
summit
of Mount
Everest
(29
,028
ft).
Raising Numbers to Powers
a
0
permit
s
you
to raise a po sitive number
(either
an integer
or
a decimal)
to
any
power. For
example
,
calculate
2
9
(i.e.
,
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2
x
2).
Press
Display
2miiE]9
[ZJ
1512.00
Now
find
8
-
1.
25(;7.
Press
Display
8miiE]
18.00
1.2567
rmJ
a
0
10.07
In
conjunction
with
oo
,a
[ZJ
provides
a
simple
way
to
extract
roots. For ex
a
mple
,
find
the
cube
root
of 5
(Thi
s
is
equivalent to 5
'
/ .
'
) ..
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