Sure, let's express these numbers in the correct form.
1. Radius of the Sun in Scientific Notation:
The radius of the Sun is approximately 696,000 kilometers. To express this number in scientific notation, we need to rewrite it as a product of a number between 1 and 10, and a power of 10.
The number 696,000 can be written as [tex]\( 6.96 \times 10^5 \)[/tex].
Therefore, in scientific notation, the radius of the Sun is [tex]\( \boxed{6.96} \times 10 \boxed{5} \)[/tex] kilometers.
2. Size of the Bacterial Cell in Expanded Notation:
The size of the bacterial cell is given as [tex]\( 1.9 \times 10^{-4} \)[/tex] millimeters. Expanded notation means writing the number out in full without exponents.
Hence, [tex]\( 1.9 \times 10^{-4} \)[/tex] millimeters is [tex]\( \boxed{0.00019} \)[/tex] millimeters wide.
Putting these into the boxes provided:
- In scientific notation, the radius of the Sun is [tex]\( \boxed{6.96} \times 10 \boxed{5} \)[/tex] kilometers.
- In expanded notation, each bacterial cell is [tex]\( \boxed{0.00019} \)[/tex] millimeters wide.
