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Simplify the following expressions.

  1. Write as a power.



  2. Identify the error(s) in the following solution; then, write the correct solution.





  3. The light intensity of a floodlight is 100% at its source. The formula for the percent intensity of a floodlight, at a distance of d metres from its source, is given by I = 100d -2. Without using a calculator, determine the intensity of a flood light 5 m from its source.