please this is for my final grade
A 127 years
B 54 years
C 12 years
D 6 years

Answer:
D 6 years
Step-by-step explanation:
p(256)=2^x+2
2^x+2=2^8
x+2=8
x=6
Therefore, D 6 years
I hope this helped and have a good rest of your day!