It would have to be ofr gamma perhaps?
B. 18
Explanation
The dot product or scalar product is an algebraic operation that takes two equal-length sequences of numbers (usually coordinate vectors), and returns a single number
it is given by.
![\begin{gathered} u=(u_x,u_y) \\ v=(v_{_x},v_y) \\ u\cdot v=(u_xv_x+u_yv_y) \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20u%3D%28u_x%2Cu_y%29%20%5C%5C%20v%3D%28v_%7B_x%7D%2Cv_y%29%20%5C%5C%20u%5Ccdot%20v%3D%28u_xv_x%2Bu_yv_y%29%20%5Cend%7Bgathered%7D)
so, we can find the dot product by multiplying the corresponding values in each vector and adding them together
Step 1
get the dot product
let
![\begin{gathered} v_1=(2,4) \\ v_2=(-1,5) \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20v_1%3D%282%2C4%29%20%5C%5C%20v_2%3D%28-1%2C5%29%20%5Cend%7Bgathered%7D)
then
![\begin{gathered} v_1\cdot v_2=(2\cdot-1)+(4\cdot5) \\ v_1\cdot v_2=-2+20 \\ v_1\cdot v_2=18 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20v_1%5Ccdot%20v_2%3D%282%5Ccdot-1%29%2B%284%5Ccdot5%29%20%5C%5C%20v_1%5Ccdot%20v_2%3D-2%2B20%20%5C%5C%20v_1%5Ccdot%20v_2%3D18%20%5Cend%7Bgathered%7D)
therefore, the answer is
B. 18
I hope this helps you
Answer: 4 3/4 meters
Step-by-step explanation: To check your answer you can add 4 3/4 to -2 1/2 to get 2 1/4 meters.