Ameteorologist tracks the movement of a thunderstorm with doppler radar. at 8: 00pm the storm was 55 mi northeast of her station. at 11: 00 pm the storm is at 75 mi north. what's the direction of the average velocity of the storm? and the magnitude of the average velocity of the storm?

At 8:00 pm, the velocity of the storm is 55 mi northeast. Assuming that the direction is exactly northeast, the angle is 45°
At 11:00 pm, the velocity is 75 mi north. The angle is 90°
In vector form
55 ∠ 45°
and
75 ∠ 90°
The magnitude and direction of the average velocity is
(55 ∠ 45° + 75 ∠ 90° ) / 3