I would say that the last one would be the most accurate.
The area of a right triangle with side lengths 7 and 7 is 
The answer is 0.6, 5 or higher add one more, 4 or less stays the same
Answer with Step-by-step explanation:
We are given that:
tanA = 0.45
tanA= 
= 
⇒
=0.45
⇒
=
⇒
=
⇒ AC= 20
Hence, by pythagoras theorem
AB²=AC²+BC²
AB²=20²+9²
AB²=481
⇒ AB=21.9 units
Hence, the approximate length of AB is:
22 units
X=the man's age
500-2x=394
-500 -500
-2x=-106
-2x/2=-106/-2
x=53
FINAL ANSWER: 53 years old
Hope this helps! :)