a)= 4×10^2
b)= 6×10^3
c)= 2×10^6
d)= 4×10^-1
hope this helps
= 4 × 10^2
= 6 × 10^3
= 2 × 10^6
= 4 × 10^-1
( to find the standard form just count the zeros. )
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