if you do inverse operations you get s=285
You subtract 8,725 to the other side so the problem would be w=10,619-8,725 and the answer would be W=1,894
To find the number of half lives divide the total number of days by the number of days for 1 half live:
1104 / 138 = 8
There are 8 half lives.
To find the total amount left multiply the starting amount by 1/2 to the 8th power:
38 * 0.5^8 = 0.148 = 0.15 grams
The answer is the last one.
Is there a graph or anything. I need context
12/9÷5/20
=12/9*20/5
=4/3*4
=16/3 ans..
