Ahiker in africa discovers a skull that contains 32% of its original amount of c-14. find the age of the skull.

according to  a formula that i found online, we have

t = [ ln (n / n0) / (-0.693) ]  * 5730          where t is the age of the fossil, n / n0  is the percent of  c-14 that remains and 5730 is the half-life of c- we have

t = ( ln (.63) / (-0.693)) * 5730 = about 3820 yrs old

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk