Which specialized carbohydrate is used for structure in shrimp? cellulose glucagon glycogen chitin

Which one ? is the answer and how to find this answer

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %