If the Scalar Product of Two Vectors $\overrightarrow { \mathrm { A } }$

question 53

Multiple Choice

If the scalar product of two vectors, $\overrightarrow { \mathrm { A } }$ and $\overrightarrow { \mathrm { C } }$ ,is equal to -3.5,if $| \overrightarrow { \mathbf { A } } | = 2.0$ ,and the angle between the two vectors when they are drawn starting from the same point is equal to 130 $\degree$ ,what is the magnitude of $\overrightarrow { \mathrm { C } }$ ?

• A)2.1
• B)2.5
• C)2.3
• D)2.7
• E)3.1