Question

One of the byproducts of nuclear power generation is Uranium-233. Uranium is decaying at a constant 32% rate per day. If 12,880 pounds are produced from a power plant, what will the amount be in 20 days?
A 21.4009
B 644.208
C 6955.200
D 8243.563

Answer 1

Answer:(12,880 lbs) x (1 - 0.32)^20

                                       = 5.755 ibs

Step-by-step explanation:

                     

Answer 2

We make use of the equation,
                                amount in days = original amount x (1 - rate of decay)^ n
where n is the number of days. 
Substituting the known values,
                           amount = (12,880 lbs) x (1 - 0.32)^20
                                        = 5.755 lbs
The answer should be 5.755 lbs which is not among the choices.