Aboard that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density . the board is floating partially submerged in water of density 1000 kg/m3. what fraction of the volume of the board is above the surface of the water?

Sorry my friend i don't know the answer. i am just in 6th

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.