Mai noticed that her checking account currently has a balance of $50.03. She has set up her phone bill to automatically withdraw funds each month. If Mai’s phone bill is $62.50 per month, will her balance be positive or negative after the phone bill is applied this month? Explain how you know.

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