Car gets 12 miles per gallon uphill and 24 miles per gallon downhill. if the car goes to the top of pikes peak and back (48 miles uphill followed by 48 miles downhill), what is the car's gas mileage, in miles per gallon, for the entire trip?

The car's gas mileage, in miles per gallon, for the entire trip is 16.

Explanation:

Car gets 12 miles per gallon uphill and 24 miles per gallon downhill.

Uphill mileage = 12 miles per gallon

Downhill mileage = 24 miles per gallon

Distance to peak = 48 miles.

      Distance to peak = Uphill mileage x Gas used uphill

      48 = 12 x Gas used uphill

      Gas used uphill = 4 gallon

      Distance to peak = Downhill mileage x Gas used downhill

      48 = 24 x Gas used downhill

      Gas used downhill = 2 gallon

Total distance traveled by car = 48 + 48 = 96 miles

Total gas used = 4 + 2 = 6 gallons

Total distance = Mileage x Gas used

96 =  Mileage x 6

Mileage = 16 miles per gallon

The car's gas mileage, in miles per gallon, for the entire trip is 16.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.