I THINK IT IS B
B) D(X)= X-8x4
SOLUTION
We have been given the equation of the decay as

So we are looking for the time
Plugging the values into the equation, we have

Taking Ln of both sides, we have

Hence the answer is 4308 to the nearest year
The answer is B.
14 + 15x
14 + 15(5)
14 + 75
89
The greatest number of planes determined by four collinear points is ∞ , infinity