A hiker wants to determine the height of a tree. She measures the tree's shadow to be 20.9 meters long. Her own shadow at the same time is 2.2. Meters long. If the hiker is 1.7 meters tall, how tall is the tree?

Hmmm i had this before , give me a sec

The answer is d. 16^2 + 63^2 = x^2hope this .

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.