Math 3- TEST THURS 1/19 Exponential Applications and Log and Exponential inequalities
Make sure you know how to do the problems from last week's Review Sheet # 9, 11, 15, 18, 20, 22.
Answers to today's review:
(Answers may be a little different due to rounding)
1. t = 835.9 yrs (may be up to 847.1 if rounding)
2. r= -.000121 t = 15,682.8 yrs
3. t = 3013.7 yrs
4. r= -.4581 t= 1.51
5. r= -.022
t=71.7 (exact) 73.2 if use r=-.022
6. r= -.0000286 t=80,390.66 (exaxt) 80,509.96 using rounded r
7. Use A = P ( 1-r)t $6495.39
8. Use A = P(1+r)t $4637.09
b) t=30.99 or 31 years