Can someone tell is this growth our decay and why?

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

If g(x) is an odd function, which function must be an even function?

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?