Respuesta :

Answer:

B

Step-by-step explanation:

No need to panic, it's much more simpler than you think.

10^4 = 10,000

10^3 = 1,000

(7.1 * 10,000) * (4.8 * 1,000) =

(7.1 * 4.8) * (10^3 * 10^4) =

= 34.08 * 10^7

= 3.408 * 10^8