Which of these is correct?
A. (9.9x10^7) (5.8x10^6) = 5.72x10^13
B. (8.8x10^8) (4.2x10^7) = 13x10^15
C. (4.6x10^5) (2.1x10^4) = 2.5x10
D. (2.9x10^8) (1.3x10^7) = 3.77x10^15
A. (9.9x10^7) (5.8x10^6) = 5.72x10^13
B. (8.8x10^8) (4.2x10^7) = 13x10^15
C. (4.6x10^5) (2.1x10^4) = 2.5x10
D. (2.9x10^8) (1.3x10^7) = 3.77x10^15