45.0$$^\circ$$
3.00
$$\vec{A}=k\vec{u}$$
$$\vec{u} =$$ 0.71 $$\hat{i}$$ + 0.71 $$\hat{j}$$
$$k =$$ number of u's $$=$$ 2.00
$$\vec{A} =$$ 1.41 $$\hat{i}$$ + 1.41 $$\hat{j}$$