Many chemisty conferences have held a 50- trillion angstrom run (two significant figures). how long is this run in kilometers and in miles? (1 a = 1 x 10-10m)

Scientists often have to 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 number in an alternate form.