PLEASE RATE 5 STARS
Your answer would be 5.90 for the following reasons:
If you take your angle measurement (40) and the length from A to B you would come out with this formula: 7 x tan 40
To figure this out on a calculator press "TAN" and type 40 and then multiply it by 7 and your answer would be 5.87 but rounded to the nearest hundredth it would be 5.90.