Express the Number Without Exponents $2.21 \times 10 ^ { - 4 }$

question 187

Multiple Choice

Express the number without exponents.
- $2.21 \times 10 ^ { - 4 }$

• A)0.00221
• B)0.0000221
• C)-221,000
• D)0.000221

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Definitions:

Retina

The light-sensitive layer of tissue at the back of the inner eye, containing photoreceptor cells that convert light into neural signals.

Brain

Ganglionic mass at the anterior end of the nerve cord; in vertebrates, the brain is located in the cranial cavity of the skull.

Lens

A transparent, flexible structure in the eye that focuses light onto the retina to produce clear images.

Thermoreceptors

Sensory receptors in the skin and other parts of the body that detect changes in temperature.