Use the Parallelogram Rule to Find the Magnitude of the Resultant

Multiple Choice

Use the parallelogram rule to find the magnitude of the resultant force for the two forces shown in the figure. Round to
one decimal place.
-A force of $639 \mathrm { lb }$ is required to pull a boat up a ramp inclined at $27 ^ { \circ }$ with the horizontal. How much does the boat weigh?

A) $569 \mathrm { lb }$
B) $1977 \mathrm { lb }$
C) $1408 \mathrm { lb }$
D) $612 \mathrm { lb }$