Addison is standing in the middle of a large field throwing baseballs. He throws the first ball 20 yards straight out. He turns 90 degrees to the right and throws a second ball 23 yards straight out. He turns 90 degrees to the right again and throws a third ball 45 yards straight out. What is the shortest distance he can walk to retrieve all three balls (he does not need to return to his original spot). Round to the nearest tenth.

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices