Question

Express 450 in exponential form.

• A. $2\times 3\times 5$
• B. $2\times 3^2\times 5$
• C. $2\times 3^2\times 5^2$
• D. $2\times 3^2\times 5^3$

Answer 1

The correct option is C $2\times 3^2\times 5^2$

Using prime factorisation,
$\begin{array}{cc}2& 450\\ 3& 225\\ 3& 75\\ 5& 25\\ 5& 5\\ & 1\end{array}$
$\Rightarrow 450=2\times 3^2\times 5^2$