Answer:
(4.2*10^4)*(2*10^3)=8.4*10 power of 7
Explanation:
(4.2*10^4)*(2*10^3)
42000*2000
84,000,000
8.4*10^7
(4.2 X 10,000) X (2 X 1,000)
42,000 X 2,000= 84,000,000
Hope this helps
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