What is one-half of $1.2 \times 10^{30}$ ?
(A) $6.0 \times 10^{30}$
(B) $6.0 \times 10^{29}$
(C) $0.6 \times 5^{30}$
(D) $1.2 \times 10^{15}$
(E) $1.2 \times 5^{30}$
What is one-half of $1.2 \times 10^{30}$ ?
(A) $6.0 \times 10^{30}$
(B) $6.0 \times 10^{29}$
(C) $0.6 \times 5^{30}$
(D) $1.2 \times 10^{15}$
(E) $1.2 \times 5^{30}$

## Solution

$$
\begin{aligned}
\frac{1}{2}\left(1.2 \times 10^{30}\right) & =0.6 \times 10^{30} \\
& =0.6 \times 10 \times 10^{29} \\
& =6.0 \times 10^{29}
\end{aligned}
$$

ANSWER: (B)