What's the distance between the points (-3,11) and (5,5)

Using the distance formula, we first find the distance from -3 and 5 (-3-5)=-8). Next, we square that (64). We then repeat the process for the y values (11-5=6, and 6^2=36).We add them up (64+36=100), and square root that to get 10

C. i believe it is (5×(-20))+(100×(0.7))