A machine launches a tennis ball at an angle of 25° above the horizontal at a speed of 14 meters per second and returns to level ground. Which combination of changes can produce an increase in the time of flight for the second launch? a. decrease the launch angle and decrease the ball's initial speed b. decrease the launch angle and increase the ball's initial speed c. increase the launch angle and decrease the ball's initial speed d. increase the launch angle and increase the ball's initial speed

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