Answer:
500
Explanation:
( 4 x 10^7 ) ÷ ( 8 x 10^4 )
= ( 4 x 10^4 ) ( 10^3 ) ÷ ( 4 x 10^4 ) x 2
= 10^3 ÷ 2
= 1000 ÷ 2
= 500
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