I need help with the question

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Located at the epidermal-dermal junction of the skin. select all true statements about the transformation of melanocytes into abnormal cell