Type the correct answer in each box. 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.

In scientific notation, the radius of the Sun is
___ × 10 ___
kilometers.

In expanded notation, each bacterial cell is
millimeters wide.