Dish A had cells with a radius of 2.2 x 10-12 cm. Dish B had cells that had a radius of 4.7 × 10-10 cm. What is the sum of the radii of the two types of cells, using scientific notation? O A. 47.22 × 10-13 cm OB. 472.2 × 10-12 cm O c. 4.722 × 10-10 cm O D. 4.722 × 10-14 cm