
Step-by-step explanation:
Since we have given that

By using logarithmic on both sides we get,

(∵
)
Now, differentiating on both sides ,we get,



Answer:
Time=
years
Step-by-step explanation:
Let total time
Initial Amount
Final Amount
Total interest = Final Amount - Initial Amount

Simple Interest 
Answer:
Expanded Notation Form:
20,000
+ 3,000
+ 900
+ 50
+ 8
Step-by-step explanation: