Answer:
She has descended a total of 18 feet from the top to her friend.
Explanation:
Anna is 26 ft. high on a rock-climbing wall.
She descends to the 15-foot mark,means she come to a height of
feet and rests.
Then climbs down until she reaches her friend, who is 8 feet from the ground.
So, she climbs down
feet more.
Hence, in total Anna has descended
feet
The answer : She has descended a total of 18 feet from the top to her friend.