Fill in the blanks /49=1/7

Use set buikder notation to represent the following set: {, -2, -1, 0}

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish