Throwing a ridget
Description
HP15C Owner's Handbook  Pages 181184
Champion ridget hurler Chuck Fahr throws a ridget with an upward velocity of 50 meters/second. If the height of the ridget is expressed as
h = 5000(1 – e^{–t/20}) – 200t
In this equation, h is the height in meters and t is the time in seconds. The desired solution is the positive value of t at which h = 0.
Program Resources
Labels
Program
Line 
Display 
Key Sequence 

000 



001 
42,21,11 
f LBL A 

002 
2 
2 

003 
0 
0 

004 
10 
÷ 

005 
16 
CHS 

006 
12 
eˣ 

007 
16 
CHS 

008 
1 
1 

009 
40 
+ 

010 
5 
5 

011 
0 
0 

012 
0 
0 

013 
0 
0 

014 
20 
× 

015 
34 
x↔y 

016 
2 
2 

017 
0 
0 

018 
0 
0 

019 
20 
× 

020 
30 
− 

021 
43 32 
g RTN 
