Question

What is the magnitude of the vector (7, -4) to the nearest tenth?

2.4
5.7
8.1
9.0

Answer 1

Explanation:

Apply the Pythagorean Theorem: hyp² = 7² + (-4)² = 49 + 16 = 65.

The magnitude of this vector <7, -4> is 8.1, to the nearest tenth.