Question

If $0.00044=$$4\cdot 4\times {10}^n$ then, find the value of $n$.

• A. $4$
• B. $5$
• C. $-4$
• D. $-5$

Answer 1

The correct option is C $-4$

$0\cdot 00044=\frac{44}{100000}=\frac{4\cdot 4\times {10}^1}{{10}^5}$
$=4\cdot 4\times {10}^{-4}$
Now
$4\cdot 4\times {10}^{-4}=4\cdot 4\times {10}^n$
$\therefore n=-4$