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A permutation is focused on a specific order, while a combination is not focused on the order but on the content of what is grouped.
AB and BA are different permutations because they are in different orders, but they are the same combination because they both contain the letters A and B.
So, we see that AB and BA are one combination.
AC and CA are also another combination because they are made up of the letters A and C.
Same goes for BC and CB, this is also one combinations.
This totals up to C. 3 combinations. Now you know the difference between permutations and combinations!
Have a wonderful day!
Answer:
4.87 × 10-5
Step-by-step explanation:
Hopes this helps.
45 degrees or pi/4 radians is the correct answer
Multiply 370 by 0.16 get get 16%
370 x 0.16 = 59.2%
The Surface area of the whole cone is 4408.56 cm²
The Surface area of the tips that is removed is 376.8 cm²
The Surface area of the megaphone(hollow) is 2712.96 cm²
<h3 /><h3>What is surface area?</h3>
Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape.
Therefore,
Surface area of the whole cone = πr² + πrl
Therefore,
Surface area of the whole cone = πr(r + l)
where
- r = radius = 18 cm
- l = edge length = 60 cm
Surface area of the whole cone = 3.14 × 18(18 + 60) = 4408.56 cm²
Surface area of the tips that is removed = 3.14 × 4 (18 + 12) = 376.8 cm²
Surface area of the megaphone(hollow) = πrl
Surface area of the megaphone(hollow) = 3.14 × 18 × (60 - 12) = 2712.96 cm²
learn more on surface area here: brainly.com/question/7410402
