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= 3 x 10^13 + 2 x 10^13 *10^1 =
= 10^13 * (3 x 1 + 2 x 1 x 10)=
= 10^13 * (3 + 20)=
= 23 * 10^13 =
=2,3 * 10^14
odp. A