Question

PLEASE HELP

Answer 1

C because if you subtract 57 from 100, you get 43. Then you take the total amount of Uranium and multiply it by 43 15 times you get 0.739 

Answer 2

Answer:

C) 0.739

Step-by-step explanation:

We have been given Uranium-233 is decaying at a constant 57% rate per day. There were 3,820 pounds of Uranium-233 produced from a power plant.

To find the amount of uranium left after 15 days we will use continuous exponential decay function.  

$y=a*e^{-kt}$, where,

a = Initial amount,

e = Mathematical constant,

k = A number representing decay rate in decimal form.

t = Time.

Let us convert our given rate in decimal form.

$57\%=\frac{57}{100}=0.57$

Upon substituting our given values in above formula we will get,

$y=3,820*e^{-0.57*15}$

$y=3,820*e^{-8.55}$

$y=3,820*0.0001935450995581$

$y=0.739342280311942\approx 0.739$

Therefore, the amount of Uranium-233 after 15 days will be 0.739 pounds and option C is the correct choice.