Sheila is climbing on a ladder that is attached against the side of a jungle gym wall. She is 7 feet off the ground and is 3 feet from the base of the ladder, which is 18 feet from the wall. How high up the wall is the top of the ladder? The ladder is attached to the wall of the jungle gym at a height of feet.

Hi there!

The correct answer is 42 ft.

Step-by-step explanation:

For this special question, you need to set up a proportion, because you have two similar triangles.

In this case you will have, (7/x) = (3/18)

20

step-by-step explanation:

we need to divide the number of toy dinosaurs, 156, by the number of brothers, 4:

in order to estimate, we can use compatible numbers:

156 ÷ 4

  ↓

160   ÷ 4 = 40        

the correct answer is a).