50 Why are the solutions to the proportions x
10
10
50
20
the same?
20 and
O because both result in the equation 20x-500, which simplifies to x = 25
because both result in the equation 20%= 500, which simplifies to x = 250
O because both result in the equation 10x= 1,000, which simplifies to x = 10
because both result in the equation 10x = 1,000, which simplifies to x - 100

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