### Home > CALC > Chapter 11 > Lesson 11.4.1 > Problem 11-130

11-130.

**Multiple Choice: **The luminous intensity of a light bulb, measured in lumens per ft

, varies inversely as the square of the distance

*s*from the bulb.

*lumens per ft*

when

*ft for a*

lumens per ft

lumens per ft

lumens per ft

lumens per ft

lumens per ft

When ,

*?*

Substitute in the known values and solve for

*.*