3. if p varied directly proportional as q, and p = -18 when q-9, find p when q = 11

How did you find the rise and the run?

The intensity of illumination (i) of light varies inversely as the square root of the distance (d) from the light. at a distance of 20m, a light has an intensity of 100 candela. find the intensity of the light at a distance of 35m.​

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