Answer:
d=9
Step-by-step explanation:
First we can do same to both side by adding 2 to both sides:
1=1/3d-2
+2 +2
--------------
3 = 1/3d
Then to get the d on its own, we multiply each side by 3
3=1/3d
*3 *3
---------
9=d
Our final answer is 9
d = 9
Given
1 = d - 2 ( multiply through by 3 to clear the fraction )
3 = d - 6 ( add 6 to both sides )
9 = d
320,000 is the answer
have a good day!!
A. 7/12
B. 27/8 or 3 & 3/8
5 millicuries
Half life is 7 days which means it will be at 10 millicuries if we half that again for another 7 days then it will be 5.
