The answer to the question is D 39
When you write the equation of a circle in the form
Then the center of the circle has coordinates 
and the radius is 
So, in your case, the center of the circle is 
Answer: 30g
Step-by-step explanation:
In this question (t½) of isotope is 40 days, which means that after 40 days half of the sample would have decayed and half would be left as it is.
After 40 days ( first half life) 240 /2 = 120 g decays and 120 g remains left.
After another 40 days ( two half lives or 80 days) 120 /2 = 60 g decays and 60 g remains left .
after three half lives or 120 days, 60/2 = 30g decay and 30 g of the isotope will be left.
Answer:
A
Step-by-step explanation: got 100 on it
Answer:
52o I think
Step-by-step explanation:
