To find out how many more people live in China than in India, we first need to express both populations in the same format:
- China's population: \( 1.45 \times 10^9 \) (which is 1,450,000,000)
- India's population: \( 1,400,000,000 \) (which can be expressed as \( 1.4 \times 10^9 \))
Next, we can subtract India's population from China's population:
\[ 1.45 \times 10^9 - 1.4 \times 10^9 = (1.45 - 1.4) \times 10^9 = 0.05 \times 10^9 \]
Now, we can rewrite \( 0.05 \times 10^9 \) in scientific notation.
\[ 0.05 \times 10^9 = 5 \times 10^{-2} \times 10^9 = 5 \times 10^7 \]
Thus, the number of people by which China's population exceeds India's population is \( 5 \times 10^7 \).
So the correct response is:
5×10⁷