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2 answers:
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Answer:
Step-by-step explanation:
We have to fill the blank.
The number of permutations of n elements taken r at a time is given by the formula:
Permutation is an arrangement of subsets of a larger set in regard with order of the arrangement.
where n is the the larger set and we have to choose r items from n such that there is no repetition.
In permutation, order is important.
The given pyramid's total surface area is 3. 24.0 square feet.
Step-by-step explanation:
Step 1:
To calculate the surface area of the given figure, we need to find the surface areas of the different shapes in the figure.
There are 3 triangles and 1 square in the figure.
Step 2:
All the triangles are similar.
The surface area of a triangle =
The similar triangles have a base length of 3 feet and a height of 2.5 feet.
The surface area of 1 similar triangle = square feet.
The surface area for all the similar triangles = square feet.
Step 3:
The surface area of a square is the square of its side length. The square has a side length of 3 feet.
The surface area of the square = square feet.
Step 4:
To calculate the total surface area we sum up all the individual surface area.
The total surface area = square feet which is the third option.