Question

The amount of light I (in milliwatts per square centimeter) of a 50-watt light bulb at a distwnce of d centimeters is described by thrme equation I = 8910d^-2 a. simplify the right side of the equation b. Substitute 80 for d in the equation you found in a.) and solve for I. What does your result mean in this situation?

Answer 1

Answer:
`\begin{gathered} a)\text{ I = }(8910)/(d^2) \\ b)\text{ I = }1.39mW/m^2 \end{gathered}`Explanations:

The amount of light of the bulb is represented by I

`I=8910d^(-2)`

a) Simplify the right side of the expression

`I\text{ = }(8910)/(d^2)`

b) Substitute 80 for d in the equation.

d = 80

`\begin{gathered} I\text{ = }(8910)/(80^2) \\ I\text{ = }(8910)/(6400) \\ I\text{ = }1.39 \end{gathered}`

The amount of light I of the 50-watt light bulb is 1.39 milliwatts per square centimeter