1.

1.6 x 2​

Answer» ONG>Step-by-step explanation:

13²=169

160=(13-Δ)²=169–26Δ+Δ²

9≈26Δ

Δ≈9/26≈0.346

√160≈13–0.346≈12.65

√1.6≈1.265



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