Hi guys I need help what is -55/8 (fraction) as a decimal

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?