The image contains a problem related to vector magnitudes and their angle.

The problem appears to be:

• Two vectors $\vec{A}$ and $\vec{B}$ are given, where $|\vec{A}| = 4 \, \text{m}$ and $|\vec{B}| = 5 \, \text{m}$.
• The angle between these two vectors is $60^\circ$.
• The task is to calculate $|\vec{A} + \vec{B}|$, the magnitude of the resultant vector.

The formula for the magnitude of the resultant vector $\vec{A} + \vec{B}$ is: $|\vec{A} + \vec{B}| = \sqrt{|\vec{A}|^2 + |\vec{B}|^2 + 2|\vec{A}||\vec{B}|\cos(\theta)}$ where:

• $|\vec{A}| = 4 \, \text{m}$,
• $|\vec{B}| = 5 \, \text{m}$,
• $\theta = 60^\circ$.

Let me calculate the magnitude.