Find the height of a sharp-crested free-flow rectangular weir to pass a discharge of 0.4 m/s with an upstream depth of 1.0 m. The width of the weir is 2.0 m and is equal to the width of the channel. Answer choices:
5x-9
6x+20
6x^2-23x+20
6x^2-14x-9

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte