please i need help with these questions Asap

- How many miles can a fighter jet flying at 250 meters per second travel in 6 hours? (Show calculations) - The density of mercury (Hg) at 25C is 13.5g/mL. What is the mass in kilograms of 185.0mL of mercury? (Show calculations) - The mass of an electron is 9.10941031kg. What is the mass in pounds? (Show calculations) Dry ice freezes at 79C. What is the temperature in F ? How about in K ? (Show calculations)