Find the magnitude of v. v = -3i+ 40 + 7k v =

The magnitude of the given vector is 40.72 units.

Step-by-step explanation:

The given vector is

We know that for any vector 'r' the magnitude is given by

Comparing with the given vector we have

x = -3

y = 40

z = 7

Thus the magnitude equals  

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.