P
ocket
R
efeRence
G
uide
— 13
KEySTrOKE
DISPLay
c
13.89
sq
yd
c
10.42
feet
(12
f
t
roll
)
c
9.62
feet
(13
f
t
roll
)
c
8.33
feet
(15
f
t
roll
)
Concrete: Bags
Find the number of bags of concrete for a
patio measuring 9′ x 15′ x 4″.
KEySTrOKE
DISPLay
o
0.
9 f x 1 5 f
x 4 i =
45.
cu
feet
C
67.50
bag
Finding the Cost
of Materials
Cost of Concrete
How much does 216 cubic feet of concrete
cost, if the cost per cubic yard is quoted at
$50?
KEySTrOKE
DISPLay
o
0.
2 1 6 f f f
216.
cu
feet
Ç y
8.
cu
yd
x 5 0 Ç •
(Cost)
400.
00
(Cost = approx. $400)
(cont'd)
Auto Shut-Off and Batteries
reset
If your calculator should ever “lock up,”
press reset — a small hole located above
the
C
key/upper right. Use the end of a
paper clip to press the button.
auto Shut-Off
After 8 to 12 minutes of non-use.
Batteries
Batteries Included:
Two LR-43 batteries.
Battery Life:
575 hours of actual use.
To replace the batteries, use a small
Phillip’s head screwdriver and unscrew the
single screw in the center of the battery
door, located on the back of the calculator.
Carefully remove the battery
door, remove the old batteries
from the clips, and replace
them with two new LR-43
batteries. Make sure the
positive sides (+) are facing up.
Replace the battery door and
reattach the screw.
PRG8509E-B.indd 12
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Summary of Contents for 8509
Page 1: ...Pocket Reference Guide Model 8509...
Page 20: ...PRG8509E B indd 20 4 2...
