8x10 exponent -3 is how many times as great as 4x10 exponent -6

2000

Hi there !

(8ₓ10⁻³)/(4ₓ10⁻⁶) =

= 2ₓ10⁻³⁻⁽⁻⁶⁾

= 2ₓ10⁻³⁺6

= 2ₓ10³

= 2ₓ1000

= 2000

Good luck !

A.  The difference of the two means is significant, so the null hypothesis must be rejected.

B.  The difference of the two means is significant, so the null hypothesis must be accepted.

C.  THE DIFFERENCE OF THE TWO MEANS IS NOT SIGNIFICANT, SO THE NULL HYPOTHESIS MUST BE REJECTED.

D.  The difference of the two means is not significant, so the null hypothesis must be accepted.