Select all the fractions that are equal to 4.9 Group of answer choices LaTeX: \frac{490}{10}490 10 LaTeX: \frac{49}{10}49 10 LaTeX: \frac{490}{100}490 100 LaTeX: \frac{49}{100}49 100 LaTeX: \frac{490}{1000}490 1000 LaTeX: \frac{49}{1000}

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z