Which of the following answer choices results in the highest average speed\(?\)

During acceleration testing, a performance car launches from the starting line, and 4 seconds later is traveling 27 m/s. It continues accelerating, and 10 seconds after launch the car reaches 44 m/s.

What is its average acceleration from 27 m/s to 44 m/s?

Luke is driving to work. The first mile of his drive takes three minutes. The next nine miles of his drive take 12 minutes. What is his average speed over this 10-mile stretch in miles per hour?

A solid ball is launched straight up with a velocity of 12 m/s from a point 25 meters above the ground. It reaches its maximum height and begins to come back down. It passes the point from which it was launched and continues to free fall straight down until it reaches the ground (25 meters below the launch point).

What is the total distance the ball travels from when it is launched upwards until it strikes the ground?

A cannonball is fired from a cannon oriented horizontally on a castle wall, 7 meters above the ground. The cannonball strikes the ground 836 meters (horizontally) away. What is the magnitude of the velocity of the cannonball as it exits the cannon?

Use g = 9.81 m/s² for the acceleration due to gravity. Assume there is no air resistance.

You may find the following formulas helpful:

\(v_f = v_i + at\)

\(v_f^2 = v_i^2 + 2ad\)

\(d = \frac{1}{2}at^2 + v_it\)