Question

Use the dot product to find |v| when v= (-8, 2)

Answer 1

It is (8, 2)

Explanation:

The lines make it positive

Answer 2

= 2 sqrt(17)

or C if you're taking it on edge.

Explanation:

To find the magnitude of v using the dot product

|v| = sqrt(v1*v1 + v2*v2)

= sqrt( -8*-8 + 2*2)

= sqrt(64+ 4)

= sqrt(68)

= sqrt(4*17)

= sqrt(4) sqrt(17)

= 2 sqrt(17)