Answer:
It will take 15.029 years for element X to reach mass of 260 grams
Step-by-step explanation:
The half life period of radioactive element X is 26 years
The initial mass of radioactive element X is 260 grams
Elapsed time = half life * log (beginning amount /ending amount)/log 2
Substituting the given values, we get
Elapsed time = 26 * log (390/260)/log 2
= 15.209 years
11yd is the diameter and circumference is 2πr = 2π(d/2) = πd = 11π yd
Answer:
of what tho
Step-by-step explanation:
Answer:
15.5925925926
Step-by-step explanation:
