I believe at the most, it can be near 16k years old.
the picture in the attached figure
we know that
area of the triangle is equal to

in this problem
A=47 in²
b=x
h=x
so

therefore
the answer is
x=9.7 in
See it is < and not ≤ so we don't include -4
put a circle around -4 but don't shade it in
to get there, move 4 units left from 0
then we see x is less than -4
so shade to the left of the circle
B agree
A,c, d don’t make sense
Answer: 360
Step-by-step explanation:
310 + 50 = 360