Which ocean is the only one that is located on the oceanic type of Earth’s crust with its entire surface?

Which are two new oceans by the definition of IHO?

Please help

The answer is a since the earth has different layers

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

Joe ran 130 yards because 3 feet make 1 yard so using this ratio 390 feet make 130 yards.