sam bought three folders and one notebook from the office store and spent 8.25. He went back the next day and bought two more folders and three more notebooks and spent 16. If the prices didn't change between the days, find the cost of one folder.

Match each function with its rate of growth or decay

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

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