Asap of the following is a main function of a stem? to store food for the plant to bring water to the plant to anchor the plant to the ground to store water for the plant

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.