9. Two marks example problems III

1. The value of a motor cycle $2$ years ago was $₹70000$. It depreciates at the rate of $4\%$ p.a. Find its present value.

 

Present value $=$ $₹$

 

 

2. The bacteria in a culture grows by $5\%$ in the first hour, decreases by $8\%$ in the second
hour and again increases by $10\%$ in the third hour. Find the count of the bacteria at the end of
$3$ hours, if its initial count was $10000$.

 

Count of the bacteria $=$