Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-At a state 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 1,400 pounds and the other pulls with a force of 3,400 pounds with an angle of $45 ^ { \circ }$ between them. With how much force must the monster truck pull in order to remain unmoved? HINT: Find the resultant force of the two trucks. Round your answer to the nearest tenth.

A) The truck must pull with a force of $2,605.4 \mathrm { lb }$ .
B) The truck must pull with a force of $4,500.2 \mathrm { lb }$ .
C) The truck must pull with a force of $4,276.9 \mathrm { lb }$ .
D) The truck must pull with a force of $2,197.3 \mathrm { lb }$ .