A cell is 30 µm in width. Assume that the cell is cube shaped. What would be the length of the side of the cell if you wanted to double the surface area to volume ratio of the cell?

Need asap plz hurry im being timed when a body cell divides through the process of mitosis, the chromosomes in the daughter cells a. represent only the healthiest chromosomes from the parent cell. b. represent only half of the chromosomes in the parent cell. c. are identical to the chromosomes of the parent cell. d. are formed when chromosomes from the parent cell cross over.