What does the phrase “at the eleventh hour” mean in this sentence the members of the house of representatives approved the budget “ at the eleventh hour” a) at a particular time of day b) with unanimous agreement c) before they needed to d) at the last minute

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