Acable holds a weight of 100 pounds, what is the tension at 30 degrees

The tension in the cable when it is at angle of 30° to the vertical is 86.6 lb.

refer to the attached diagram.

The cable has a weight W attached to it and it is at an angle θ 30° to the vertical.

Resolve the weight W into two components W cos θ opposite to the tension T and W sinθ perpendicular to it, as shown in the diagram.

Apply the condition for equilibrium along the direction in which the tension acts.

Substitute 100 lbs for W and 30° for θ.

Thus the tension in the cable when it is at an angle 30° to the vertical is 86.6 lb.

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.