Aradioactive isotope is unstable, and will decay by emitting a particle, transforming into another isotope. the assumption used to model such situations is that the amount of radioactive isotope decreases proportionally to the amount currently present.(a) let n(t) designate the amount of the radioactive material present at time t and let n0 = n(0). write and solve the ivp for radioactive decay of a radioactive material.(b) the half-life of a radioactive material is the time required for it to reach one-half of the original amount. what is the half-life of a material that in one day decays from 12 mg to 9 mg?

Part a: The equation is

Part b: The half life of the material is 2.4 days.

Step-by-step explanation:

Part a

The relation is given as

Rearranging the equation gives

Integrating and simplifying the equation as

This is the equation of radioactive decay of the radioactive material. For estimation of C consider following IVP where t=0,N=N_o so the equation becomes

Now substituting the value of C in the equation gives

This is the relation of concentration of unstable radioactive material at a given time .

Part b

From the given data the equation becomes as

Now half like is defined as the time when the quantity is exact half, i.e. N/N_o =0.5 so

So the half life of the material is 2.4 days.

56

step-by-step explanation:

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%