If the half life is 20 minutes, then in 40 minutes there is 2 half lives. At the end of Each half life, you will have 1/2 of the sample remaining. So...
After 20 min you have
960/2 = 480
After 40 minutes you will have
480/2 = 240 grams
it gives you the formula, so all you have to do is plug in the coordinates

Answer:
It looks like a DNA strand or an infinity sign
Step-by-step explanation:
Idk if that's the correct answer tho sorry.
Answer:
A + B = 2
Step-by-step explanation:
If A=1 and B=1 then it is 1 plus 1 which is 2
Answer:
y = 5
Step-by-step explanation:
14y + 36 = 106. subtract 36 from both sides, so now the equation is 14y = 70 because 36 is cancelled out. now divide both 14y and 70 by 14, which leaves you with y = 5