Ben is going to visit a friend on his bike but 6 kilometres into the trip his tire pops and he has to walk the rest of the way. Ben walks 4 kilometres per hour slower than he bikes, and the whole trip takes one and a half hours, If Ben's trip was 9 kilometres long at what speed was he biking?

solve that equation to answer the question

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

You work in a hospital that has 9 floors. you need to see 3 patients on each floor. how many patients do you need to see in all?

Find the area of the shaded region.