8x 10^-3 is how many times as great as 4 x 10^-6

2x10^3

2x10^9

2x10^-3

2x10^-9

It is greater by 2*10^3 times.

Step-by-step explanation:

Given:

Two numbers in scientific form we have to find the differences.

Using exponents product rule.

We know that base same then exponents are added.

So,

⇒

⇒ ...powers are added

⇒

We see that after multiplication with the numbers are same.

Then we can say that is times greater than

So 8 x 10^-3 is 2x10^3 times as great as 4 x 10^-6 .

answer: b.48 for

step-by-step explanation: