Outside of the united states, the common paper size is called A4 and measures 21 by 29.7 centimeters. Let V(x) = (21-2x)(29.7-2x)(x) be the volume in cubic centimeters of a box made from A4 paper by cutting out squares of side length x in centimeters from each cornor and then folding up the sides. What is a reasonable domain for V in this context? Explain or show your reasoning

What is your question again i don't understand

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.