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)

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step-by-step explanation:

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

good luck on your studies! : )

david edward.