in a certain space, the change in volume of an echo over time can be modeled bu the equation f(t) =ve^-2.3t, where t is the time in seconds from initial sound and v is the volume of the initial sound. what is the rate of decay for the echo volume

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