HP -22S Owner's Manual page 138

Example: A Savings Account. You deposit $2,000 into a savings
account that pays 7.2% annual interest, compounded annually. If you
make no other deposits into the account, how long will it take for the
account to contain $3,000?
r
8=-2,000
Keys:
P=O
I
.1
OISP
I
{FX} 2
.1
SOLVE
I
{N}
o
I INPUT
I
7.2 I INPUT
I
3000 II NPUT
I
2000
Eflll
NPUT
I
Display:
P?value
I
?value
F?value
B?value
N=5.83
138 8: Additional Examples
F=3,OOO
1
Description
Sets display to 2 deci-
mal places.
Selects N, prompts for
P.
Stores P, prompts for I.
Stores I, prompts for F.
Stores F, prompts for
B.
Stores B, calculates N.