\frac{-8+\sqrt{12} }{40}

Which pair of angles are vertical angles? ∠1 and ∠4 ∠1 and ∠2 ∠2 and ∠4 ∠2 and ∠3

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)