You need to remember that the product length multiplied by width expresses the area of rectangle.

Considering the the magnitude of vector `barA` expresses the width and the magnitude of vector`barB ` expresses the length and since the problem provides the magnitudes of vectors `barA` and `barB` , then you should use...

## Unlock

This Answer NowStart your **48-hour free trial** to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.

Already a member? Log in here.

You need to remember that the product length multiplied by width expresses the area of rectangle.

Considering the the magnitude of vector `barA` expresses the width and the magnitude of vector`barB ` expresses the length and since the problem provides the magnitudes of vectors `barA` and `barB` , then you should use the following property of absolute value such that:

`|bar A|*|bar B| = |barA*barB|`

You need to substitute 2 for `|bar A|` and 5 for `|bar B|` such that:

Area `= |2*5| = |10|` => Area = 10 units`^2`

**Hence, evaluating the area of rectangle under given conditions yields A = 10 units`^2` .**