A book falls from a shelf that is 5 feet above the floor. A model for the height h in feet if an object dropped from an initial height of h₀ feet is h=-16t² + h₀, where t is the time in seconds after the object is dropped. Use this model to determine approximately how long it took for the book to reach the ground.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem