Yes, definitelyl, y = x^5 represents a function of x. x^5 is a polynomial, and all poly. are functions.
It could be 1.85 meters for an adult bike.
EFG is the same as angle KLM. therefore, it is the reflection of the angle KLM
Http://www.pierce.ctc.edu/staff/dlippman/mathinsociety/Finance1.0.pdf I think this will help
X= y(d-b) over a-c would be the answer