Urgent
math nation topic 10- attached
i need work for 1-9, checking that the completed problems are correct
!

This is a question of proportions:

First we can work out how many feet it goes up for each feet he steps back:

5.5/6 ft per each feet he steps back.

Now we can multiply this by the amount of ft back the cliff is:

(5.5/6)*30 = 27.5 ft

Thus the cliff is 27.5 ft tall,

Hope this helps :)

(-1,-0.5)

step-by-step explanation: