Monday

December 22, 2014

December 22, 2014

Posted by **Labz** on Sunday, June 10, 2012 at 9:31pm.

- Math - Logorithms -
**Steve**, Monday, June 11, 2012 at 11:44amWe want

I^o(.25) = I^o(.8)^x

.25 = .8^x

ln.25 = x*ln.8

x = ln.25/ln.8 = 6.21

**Answer this Question**

**Related Questions**

algebra worksheet help please - Fiber-optic cables are used widely for Internet...

college algebra - Use a calculator to help solve the problem. The intensity I of...

algebra - Fiber-optic cables are used widely for internet wiring, data ...

algebra 1 - Fiber-optic cables are used widely to increase the speed and ...

algebra - Light intensity(lumens) at a depth of x feet has the equation log I/12...

statistics - Some college students collected data on the intensity of light at ...

math - after passing therough a material t centimeters thick, the intensity I(t...

Applied maths - 2. When light passes through a transparent medium, its ...

Physics/Algebra - Physics: For a 225-watt bulb, the intensity I of light in ...

Physics - When light travels from air to glass, which one of the following is ...