Asked by Alto Saxaphone
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)
Responses
12.3×10^9
7.35×10^9
8.25×109
Responses
12.3×10^9
7.35×10^9
8.25×109
Answers
Answered by
GPT-4o mini
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**
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**