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:
7/8
Step-by-step explanation:
1/8 + 3/4
1/8 +(3x2/4x2)
1/8 + 6/8
7/8
Answer:
the third one
Step-by-step explanation:
Answer:
140
Step-by-step explanation:
you have to first multiply them
-140
since it has to be an aditive inverse you write the opposite
140