book Maths Puzzle Numerical Ability

For a light that has an intensity of 60 candles at its source, the intensity in candles, S, of the light at a point d feet from the source is given by the formula S=60K/dē , where

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Can someone help me with this problem?

I have a square and a semicircle 3/4 down. The radius is 11 inc. I need to find the perimeter using 3.14 for pi and round the answer to one decomal place.
Thanks,
Sher
solve x^2-16x+32=0 by completing the square