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Sagot :
Answer:
2 × 10³
Step-by-step explanation:
a number expressed in standard form is
a × [tex]10^{n}[/tex]
where 1 ≤ a < 10 and n is an integer
4 ×[tex]10^{8}[/tex] × 5 × [tex]10^{-6}[/tex]
= 4 × 5 × [tex]10^{8}[/tex] × [tex]10^{-6}[/tex]
= 20 × [tex]10^{(8-6)}[/tex]
= 20 × 10²
= 2 × [tex]10^{1}[/tex] × [tex]10^{2}[/tex]
= 2 × [tex]10^{(1+2)}[/tex]
= 2 × 10³
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