On average, a commercial airplane burns about 3.9 × 10³ ml of gasoline per second. there can be as many as 5.1 × 10³ airplanes in the air in the united states at any given time. about how many milliliters of gasoline are burned per minute by commercial airplanes in flight in the united states?
1.2 x ml
this is scientific notaion

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.