The Intensity of light (in foot-candes) varies inversely as the square of x. the distance in foot from the light source. The intensity of light 2 from the source is 90 foot-candies. How far away is the source if the intensity of light is 7 foot-candies?

The intensity of light is 7 foot candles when the distance from the light source is ? feet
(Round to two decimal places as needed)

sorry i dont know my friend

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

3 is greater then both of those numbers

c

step-by-step explanation: