how many bc times as great is 4x10^6 compared to 8x10^3?
To determine the ratio between 4x10^6 and 8x10^3, we need to divide 4x10^6 by 8x10^3.
(4x10^6) / (8x10^3)
= (4/8) * (10^6 / 10^3)
= 0.5 * 10^3
= 0.5 * 1000
= 500
Therefore, 4x10^6 is 500 times as great as 8x10^3.