Can someone send me the answers to FA: PhET Lunar Lander Simulation: Net Force & Vector Addition

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

The statue of liberty is 305.5 feet high. when the angle of elevation of the sun is 50 , what is the distance to the tip of the shadow from a point at water level and directly below the highest point of the statue?