Answer:
4
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
Step 2: Subtract 8y from both sides.
Step 3: Subtract 18 from both sides.
Step 4: Divide both sides by -9.
y=4
That is exactly 8 half lives.
After 8 half - lives only (1 / 2^8) or (1 / 256) of the original 30 grams will remain.
(1 / 256) =
<span>
<span>
<span>
0.003906250
</span>
</span>
</span>
So, 30 * <span>
<span>
0.003906250 = </span></span>
<span>
<span>
<span>
0.1171875 grams will remain.
</span></span></span>
Could you make the picture clear and back it up a little then i will see it better
