Help :( submit in simplest radical form :(

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

What is the radius of the cone in the diagram? round your answer to the nearest whole number

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet