Can anyone me with this? i need an example of a 3 dimensional figure and a something that’s not a 3 dimensional figure

About 60% of the normal humanbeing's body weight is composed ofwater. how much of a 125 poundperson is water weight? f 72 pounds h 76 poundsg 75 pounds i 80 pounds

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0