Question 192802
A radioactive substance decays in a way that the amount of mass remaining after
 (t) days is given by the function: m(t) = 5e^(-0.015*t)
:
What is the mass at time t = 0?
When t=0, we have e^0 which we know is = 1, therefore
when t=0, m(t) = 5
:
:
What is the amount of mass remaining after 43 days?
m(t) = 5*e^(-.015*43)
m(t) = 5*e^-.645
:
Find e^-.645 on a good calc
m(t) = 5 * .52466
m(t) = 2.633 after 43 days