Question

The intensity of a light in lumens is the product of the brightness in lumens per square inch and the surface area of the sphere with a radius equal to the distance to the source in inches the function L (D)=2.2(4D^2) can be used to represent a particular lights intensity what does the constant 2.2 in L(D) represent

Answer 1

The other answer was correct, it is C, the brightness on e2020.

Explanation:

Answer 2

The constant 2.2 in L(D) represent the brightness in lumens per square inch.

Explanation:

Given : The intensity of a light in lumens is the product of the brightness in lumens per square inch and the surface area of the sphere with a radius equal to the distance to the source in inches the function
`L(D)=2.2(4D^2)` can be used to represent a particular lights intensity.

To find : What does the constant 2.2 in L(D) represent ?

Solution :

The intensity of a light in lumens is the product of the brightness in lumens per square inch and the surface area of the sphere with a radius equal to the distance to the source in inches.

The function given is
`L(D)=2.2(4D^2)` is the product of two terms,

`L(D)=2.2* (4D^2)`

On comparing with statement,

The intensity of a light in lumens is L(D).

The brightness in lumens per square inch is 2.2.

The surface area of the sphere with a radius equal to the distance to the source in inches is
`4D^2`

Therefore, the constant 2.2 in L(D) represent the brightness in lumens per square inch.