3. Vectors

Using the vectors given in the figure, (a) find A ● B. (b) Find A ● C.

Given two vectors $\overrightarrow{a}$ and $\overrightarrow{b}$ that form an angle $\theta$ between them, which of the following correctly expresses the scalar (dot) product $\overrightarrow{a}\cdot \overrightarrow{b}$?

Given the vectors $a=2.0i-4.0j+5.0k$ and $b=11.0i+2.5j$, what is the value of their dot product $a\cdot b$?