If $\overrightarrow { \mathbf { A } } \cdot \overrightarrow { \mathbf { C } } = - 7.5$ , $\overrightarrow { \mathbf { A } } = 3 \hat { \mathbf { i } } - 4 \hat { \mathbf { j } }$ ,and $| \overrightarrow { \mathbf { c } } | = 6.5$ ,what is the angle between the two vectors when they are drawn starting from the same point?
A)118$\degree$
B)107$\degree$
C)112$\degree$
D)103$\degree$
E)77$\degree$

Question

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The Answer of If $\overrightarrow { \mathbf { A } } \cdot \overrightarrow { \mathbf { C } } = - 7.5$ , $\overrightarrow { \mathbf { A } } = 3 \hat { \mathbf { i } } - 4 \hat { \mathbf { j } }$ ,and $| \overrightarrow { \mathbf { c } } | = 6.5$ ,what is the angle between the two vectors when they are drawn starting from the same point?
A)118$\degree$
B)107$\degree$
C)112$\degree$
D)103$\degree$
E)77$\degree$

If A→⋅C→=−7.5\overrightarrow { \mathbf { A } } \cdot \overrightarrow { \mathbf { C } } = - 7.5A⋅C=−7.5

If $\overrightarrow { \mathbf { A } } \cdot \overrightarrow { \mathbf { C } } = - 7.5$