This is an easy half-life calculation because it involves an exact integer of half-lives. 1,104 days is precisely 8 half-lives. After each half-life, one half of the original remains.
So, after 8 half-lives you will have 1 / 2^8 of the original material left.
So we start with 30 grams and 1 / 2^8 =
<span>
<span>
<span>
0.00390625</span></span></span>.
We are therefore left with (30 *
<span>
<span>
<span>
0.00390625) or </span></span></span>
<span>
<span>
<span>
0.1171875 grams of the original 30 grams of polonium.
</span>
</span>
</span>
Jan is 19 years old, and Tritt is 11
If she is running on that track she will have ran
4022.5
Answer:
a total of 12
Step-by-step explanation:
1,2,3,4,5,6,10,12,15,20,30,60,
factors are Numbers we can multiply together to get another number.
Answer:
74
Step-by-step explanation:
22/7 × 14 × ½ × 2 = 44
15 + 15 = 30
30 + 44 = 74
