To find how many more people live in China than in India, we start with the population figures you provided:
- China's population: \( 1.45 \times 10^9 \)
- India's population: \( 1,400,000,000 \) (which is equivalent to \( 1.4 \times 10^9 \))
Now, we calculate the difference:
\[ 1.45 \times 10^9 - 1.4 \times 10^9 \]
We can factor out \( 10^9 \):
\[ (1.45 - 1.4) \times 10^9 = 0.05 \times 10^9 \]
Now, convert \( 0.05 \) to scientific notation:
\[ 0.05 = 5 \times 10^{-2} \]
Thus, we have:
\[ 0.05 \times 10^9 = 5 \times 10^{-2} \times 10^9 = 5 \times 10^{7} \]
So, the answer is: \[ 5 \times 10^7 \]
Therefore, the correct response is:
5 × 10⁷