Abird starts at 20m and change 16m what is the elevation

36 m.

Step-by-step explanation:

We are asked to find the final elevation of a bird that stats at 20 m and changes 16 m.  

Since the bird's initial elevation is 20 m and it changed 16 m in positive direction, so bird's final elevation will be:  

Therefore, bird's final elevation will be 36 m.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation: