Final answer:
The given 8×10-³ is 2 times greater as 4×10². The correct answer is a. 2 times greater
Step-by-step explanation:
To find out how many times greater 8×10-³ is compared to 4×10², we can simplify each expression.
8×10-³ can be written as 0.008, and 4×10² can be written as 400.
Now we can simply divide the two numbers to find out the ratio.
0.008 ÷ 400 = 0.00002
Therefore, 8×10-³ is 0.00002 times greater than 4×10².
This means that the correct answer is a. 2 times greater.
So therefore the correct answer is a. 2 times greater