Well, 120 divided by 2 is 60
60 times 3 is 180
Betty got 180
Answer:
Height of the cliff = 13.66 m
Step-by-step explanation:
Let the height of the cliff is 'x' m and distance between the base of the cliff and the boat is 'y' m.
From right triangle AOC,
tan 30° = 

y =
------(1)
From right angle triangle BOC,
tan 45° = 

x = y - 10
y = x + 10 -------(2)
From equations (1) and (2),



x = 13.66 m
Therefore, height of the cliff is 13.66 m.
45 rolls are in a group and 27 rolls are in the other group
(6n^2-4)+(-2n^2+9)
6n^2-4-2n^2+9
4n^2+5
Hope this helps!
Arc length = x/360 × 22/7 × 6 × 2
x = 78
Arc length = 78/360 × 22/7 × 6 × 2
= 13/60 × 22/7 × 12
= 13/5 × 22/7
= 8.171