<span><u><em>Answer:</em></u> 4 dogs have completed the obedience classes
<u><em>Explanation:</em></u> We are given that 80% of the dogs completed the obedience classes and that the total number of dogs who attended the class was 5
<u>This means that 80% of the 5 dogs have completed the class</u>
Therefore: number of dogs that completed the class = 80% * 5 = 0.8 * 5 = 4 dogs