60% of the class is blonde
A(t)=A0*(1/2)^(t/30)
where t=elapsed years
A0=initial mass at t=0.
It would be 10 times greater im pretty sure.
Every other number from the first, 3rd, 5th, ..etc it adds 2 for the next number.
For the 2nd, 4th, 6th, etc term, its supposed to be 90, 78, 65, 51?
If so, It started with -12 then -13 after that -14 find the next term, all you need to do is to -15 to the current number, which is 51. then you get 36
