Answer:
and 
Step-by-step explanation:
The equation of the isotope decay is:

14-Carbon has a half-life of 5568 years, the time constant of the isotope is:


The decay time is:
(There is no a year 0 in chronology).

Lastly, the relative amount is estimated by direct substitution:





135° I think 1080( what the angles add up to) 1080÷8=135°
41 x 0.15 = 6.15, which means only 6 bands will compete.
Hope this helps.
T=0 is also a solution. Other than 0 here is a solution.