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

12.3×10^9

7.35×10^9

8.25×109

Answer 1

To find how much the world’s population increased from 1500 CE to 2020, we 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 perform the subtraction:

1. First, we need to express both populations with the same exponent for easier subtraction. We can 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 subtract:

   \( 7.8 \times 10^9 - 0.45 \times 10^9 = (7.8 - 0.45) \times 10^9 \)

   \( = 7.35 \times 10^9 \)

So the world's population increased by \( 7.35 \times 10^9 \).

The correct response is: 7.35×10^9