In 1500 CE, the world’s population was about 4.5×10^8 . In 2020, the world’s population was about 7.8×10^9 . Find how much the world’s population increased. (1 point)

Question

Responses

7.35×109
7.35 times 10 superscript 9 baseline

3.3×109
3.3 times 10 superscript 9 baseline

12.3×109
12.3 times 10 superscript 9 baseline

8.25×10^9

Answer 1

To find the increase in the world's population from 1500 CE to 2020, we need to subtract the population in 1500 from the population in 2020.

Population in 2020 = \( 7.8 \times 10^9 \) Population in 1500 = \( 4.5 \times 10^8 \)

Now, performing the subtraction:

1. Convert \( 4.5 \times 10^8 \) to the same exponent as \( 7.8 \times 10^9 \):

\[ 4.5 \times 10^8 = 0.45 \times 10^9 \]

2. Now, we can easily subtract:

\[ 7.8 \times 10^9 - 0.45 \times 10^9 = (7.8 - 0.45) \times 10^9 = 7.35 \times 10^9 \]

Therefore, the increase in the world’s population is:

\[ 7.35 \times 10^9 \]

So, the correct answer is:

7.35×10^9