The half-life of radium is 1600 years. if the initial amount is q0 milligrams, then the quantity q(t) remaining after t years is given by q(t) = q02kt. find k. k =

Step-by-step explanation:

Given data:

half life of radium is 1600 year

the equation is given as

As it is given, quantity is going halved, thus k is is going to be -ve. thus equation become

we know that

    ....1

as it is half life so we have

     ......2

comparn 1 and 2 we get

1  = - k(1600)

after simplifying it i got: -36.25 as my answer. hope that !

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.