What did the microbiologist conclude? The hypothesis is supported because on average S. Aureus was more susceptible to antibiotics than E. Coli. The hypothesis is not supported because on average S. Aureus was less susceptible to antibiotics than E. Coli.

Sorry i dont understand the question can you rephase it?

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.