HP 46 User Manual

C. Find the increase in the volume of a spherical balloon when its
radius is increased from 2 to 3 inches. (Reset the calculator to FIX
2 format.)
Solution:Volume = 4/3 7 r3
Difference in volumes = 4/3nr,3 — 4/37r 3
=4/3n(ry3 —ry3)
=4/37(3% — 23)
Press: 4 §¢ 3@-@ 4.00 &
! 3,00 +
314
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3 ! —k@ 3.00 +
Y yx
. o 200 $
2 T 3 wmm 3.00 2
! X
’ 79459 Q¢
910
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Using Factorials
The n! (n factorial) key permits you to handle permutations and
combinations with ease. To calculate the factorial, merely press
e after the associated value.
n!
EXAMPLE
A. A conference is being held between representatives of the following
Central American countries: Guatemala, El Salvador, Honduras,
Nicaragua, Costa Rica, and Panama. The flags of the 6 countries are
all flown on one pole, and each day they are arranged in a different
order. How many days would the conference have to last if the flags
were flown in all possible arrangements?
18

HP 46 Specifications

General

Brand	HP
Model	46
Category	Calculator
Language	English