An electric utility worker wants to anchor a guy wire from the top of a 20.4 -foot utility pole to a spot that is 8.5 feet from the base of the pole on level ground. How long does the guy wire need to be? Round your answer to one decimal place.

Answer:
using Pythagorean theorem
c raised to the power of 2 is equals to 20.4 raised to the power of 2 + 72.25 raised to the power of 2
which is 416.16+72.25
which is 488.41
which is 488 appropriated to the nearest one decimal place