20% of the shoes in a factor are black. one shoe is chosen and replaced. a second shoe is chosen and replaced. then a third shoe is chosen and replaced. what is the probability that none of the shoes are black?

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay

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

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?