Observer (o) spots a plane flying at a 42° angle to his horizontal line of sight. if the plane is flying at an altitude of 15,000 ft., what is the distance (x) from the plane (p) to the observer (o)?

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle