To find out how many times greater 2.3×10^(-4) is than 1.15×10^(-8), you can divide the first number by the second number:
(2.3×10^(-4)) / (1.15×10^(-8))
Now, divide the two numbers:
(2.3 / 1.15) × (10^(-4) / 10^(-8))
Simplify:
(2 / 1) × (10^(4 - (-8)))
(2 / 1) × (10^12)
2 × 10^12
So, 2.3×10^(-4) is 2 × 10^12 times greater than 1.15×10^(-8).