A tall radio tower is anchored to the ground by taut cables, called guylines. Each guyline is attached to a point on the radio tower 390 meters off the ground and makes a 65° angle with
the ground.
How long is the guyline?
Round your answer to the nearest meter.

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).