Answer:
Option a, hope you like it
Explanation:
1.5 x 10^3
1.5 ^ 1000
1500
1.4 x 10^-1
we know
a^-n
1/a^n
so,
1.4/10
0.14
2 x 10^3
2x 1000
2000
1.4 x 10^-2
1.4x1/100
0.014
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