Answer:
He has the side lengths in the wrong place in the cosine ratio. (1st Answer on Edgen)
Step-by-step explanation:
Andy was correct
2639456 is rounded to 2640000 because the 9 from 39,456 rounds up to 0 and the three changes to a 4
Elizabeth rounded down instead
Figure A best represents it because if you add 576 and 49 you get 625, which shows the theorem of a^2+b^2=c^2.
The tax added to $220 is solved by 220 X .0725 = 15.95. Add 15.95 to $220 and get $235.95. The tip (assuming it is 20% after tax ) is $235.95 X .20= $47.19
Add the $47.19 to $235.95= $283.14