The Number of Lumens (Time Rate of Flow of Light)L

question 27

Multiple Choice

The number of lumens (time rate of flow of light) L from a fluorescent lamp can be approximated by the model ​
L = -0.294x² + 97.744x - 664.875, 20 ≤ x ≤ 90
​
Where x is the wattage of the lamp.
​
Use a graphing utility to select the graph of the function.Use the graph to estimate the wattage necessary to obtain 2400 lumens.
​

• A)​ 40W
• B)​ 30W
• C)​ 45W
• D)​ 25W
• E)​ 35W

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Definitions:

Cervical

Pertaining to the neck or the cervix, the lower, narrow part of the uterus that opens into the vagina.

Cerebrospinal Fluid

A clear, colorless body fluid found in the brain and spinal cord, acting as a cushion and providing basic mechanical and immunological protection to the brain.

Choroid Plexus

A network of cells in the ventricles of the brain that produce cerebrospinal fluid.

Ventricle

A chamber of the heart or brain that receives or pumps out blood or cerebrospinal fluid, respectively.