First, you find what 20% of 10 gallons of gas would be. This will show how many gallons the car actually uses.
10 gallons x 20% =
10 x 0.20 =
2 gallons used
Then you subtract that number from the total 10 gallons to get how many gallons of gas would be wasted.
10 gallons - 2 gallons =
8 gallons of gas wasted
Crystalline crystals have sharp, well-defined melting points. Amorphous Solids don't have melting points.
Weight in water = mass of block - mass of volume of displaced water
