Energy is transferred from the sun mainly by A. mechanical
B. air currents
C. electomagnetic waves
B. conduction
please hurry guys this is due in like 10 min

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.