Answer:
Radioactive in half life is 51gram
Step-by-step explanation:
80grams:12years
X :7.6years
12x÷x=x
7.6×80÷12=51gram
Answer:
16/2 = 8
Step-by-step explanation:
23+16= 39
39+16= 55
55+16= 71
1+2=3
3+2=5
5+2=7
Answer:
0.0042
Step-by-step explanation:
0.3840
- 0.3798
‐--------------
0.0042
‐--------------
B) 30
Step-by-step explanation:
i hope this helps :)