Question 242910
w=4h
L=7+h

(h*w*L=106)
h*4h*(7+h)=106
4h^2(7+h) = 106
28h^2+4h^3 -106=0


{{{ graph( 300, 200, -10, 5, -100, 100, 4x^3+28x^2-106) }}} 

We can see from the graph that the height is approximately 1.75 feet.