Vector $\overrightarrow{\mathrm{A}}=(3.0\pm 0.3)\overrightarrow{\mathrm{i}}$ and $\overrightarrow{\mathrm{B}}=(4.0\pm 0.4)\widehat{\mathrm{i}}$ What is the magnitude of $\overrightarrow{\mathrm{R}}=\overrightarrow{\mathrm{A}}-\overrightarrow{\mathrm{B}}?$

• A

  $1.0\pm 0.5$

• B

  $1.0\pm 0.7$

• C

  $1.0\pm 0.1$

• D

  $5\pm 0.4$