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Provided the earth is moving around the sun in a circular orbit,
how many kilometers will it travel in a year?
* T he average distance between the earth and the sun being
1.496 x 10
8
km.
C ircumference equals diameter x π; therefore,
1.496 x 10
8
x 2 x π
0 t o 9
Pressing π automatically enters the value for π (3.14159...).
The constant π, used frequently in function calculations, is the ratio of the
circumference of a circle to its diameter.
<Example>
N umeric keys for entering data values.
Decimal point key. Enters a decimal point.
Enters minus symbol or sign change key.
C hanges positive numbers to negative and negative numbers to positive.
Pressing this key switches to scientific notation data entry.
O per ation D isplay
2
1
496
8
DEG
X10
DEG