Identify the answer choice that is rounded to the correct amount of
significant figures.
35.7 + 432.33 + 5142.312
a. 5610.00 b.5610.340 c. 5610.34 d. 5610.3

Ci think not

Answerthe same as;

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.