90 kilometers per hour is approximately how many miles per hour? pls

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

How do i do this activity, is appreciated

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?