Respuesta :

Answer:

8000000000000000

Step-by-step explanation:

Answer:

8000000000000000

Step-by-step explanation:

Convert both numbers to scientific notation

40000000=4*10^7

200000000=2*10^8

Multiply: 4*10^7*2*10^8=(4*2)(10^7*10^8)=8*10^(8+7)=8*10^15=8000000000000000

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