This is a multiple choice question. A certain radioactive substance is decaying so that at time t, measured in years, the amount of the substance, in grams, is given by the function f(t)=-e^t +10. what is the rate of decay of the substance after 1 year?
the choice are
a) -3 g/year
b) -ln 2 g/year
c) -2.72 g/year
d)-1.53 g/year
the choice are
a) -3 g/year
b) -ln 2 g/year
c) -2.72 g/year
d)-1.53 g/year
1 Answer
Apr 21, 2018
C.
Explanation:
If the amount of substance left is given by
So, find the first derivative, recalling that the derivative of the natural exponential function
To determine the rate of decay after
The correct answer is C.