To get more bang for his buck
A kite is a quadrilateral.
So the correct answer is A.
Hope this helps,
Davinia.
4x + 8.....the factor is 4
4(x + 2)
This is a fairly easy half-life problem
Each half-life reduces the radioactive material by one half.
So after 72 hours the radioactive material would have undergone 6 half-lives.
2^6 = 64.
So, there will be one sixty-fourth of the material left.
520 / 64 = 8.125 grams will remain.
radioactive decay is an exponential decay function.
Source:
http://www.1728.org/halflife.htm
