It takes Ariel 60 minutes to reach the hiking team's campsite, following a
trail depicted in the graph at the right.
What is the change in the elevation between Ariel's starting point and the campsite?
A) 10 feet
B) 20 fect
C) 25 feet
D) 40 feet

I think 20

because her starting point was 5 and her ending point was 25 and the difference is 20

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

-2 is the right