Answer:
B) 3×10⁶
Step-by-step explanation:
You want to find "factor" in ...
... 9×10⁻⁴ = factor × 3×10⁻¹⁰
Divide by the coefficient of "factor"
... (9×10⁻⁴)/(3×10⁻¹⁰) = factor
... (9/3)×10⁻⁴⁻⁽⁻¹⁰⁾ = factor . . . . . . denominator exponent is subtracted from numerator exponent
... 3×10⁶ = factor
The larger number is 3×10⁶ times as large as the smaller one.