Two similar figures have a scale factor of 3/5. One side of the larger figure is 20 inches. how long is the corresponding side in the smaller figure?

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Is a square always, sometimes, or never a parallelogram

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