At a county fair truck pull, two pickup trucks are attached to the back end of a monster truck as illustrated in the figure. One of the pickups pulls with a force of 2500 pounds and the other pulls with a force of 3500 pounds with an angle of 30 between them. With how much force must the monster truck pull in order to remain unmoved? (Hint: Find the resultant force 2500 lb of the two trucks.) 30 3500 lb Figure is not to scale. The monster truck must pull with approximately pounds of force. (Round to one decimal place as needed.)