Answer:
10 hours
Step-by-step explanation:
assuming its 8pm if its 8 am 4 hours
Answer:
0.04
Step-by-step explanation:
Answer:
Workings and solution to this question can be viewed in the screenshots below:
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>
Answer:
Let the two equal angles be x,
so,
x + x + 138° = 180°
or, 2x = 180° - 138°
or, 2x = 42°
so, x = 42°/2
so, x = 21°
21° is the answer.
