Please solve these problem please ASAP !

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?

Andy wants to find the distance d across a river. he located points as shown in the figure, then use similar triangles to find that d = 223.5 feet. how can you tell without calculating that he must be wrong? tell what you think he did wrong and correct his error. round your answer to the nearest tenth if necessary. andy must have used the wrong . the distance d is actually feet.

What is the value of g(8) for the function g(x) in part c? what does this value mean in the context of the situation you described in part c?