How many times greater is 8.7 x 10^7 than 1.5 x 10^4? Express your answer using either standard notation or scientific notation.

To find out how many times greater 8.7 x 10^7 is compared to 1.5 x 10^4, we can divide the two values.

(8.7 x 10^7) / (1.5 x 10^4) = (8.7 / 1.5) x 10^(7-4) = 5.8 x 10^3

Therefore, 8.7 x 10^7 is 5.8 x 10^3 times greater than 1.5 x 10^4.