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Agata [3.3K]
2 years ago
14

Find the surface area of a square pyramid with side length 4 mi and slant height 5 mi.

Mathematics
1 answer:
andriy [413]2 years ago
3 0

Answer:

SA = 56 sq mi

Step-by-step explanation:

SA = area of base + 1/2(perimeter of base)(slant height)

SA = 16 + 1/2(16)(5)

SA = 16 + 8(5)

SA = 16 + 40

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Answer:

y = x + 4

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Megan has $45.12 in her purse. She spends $7.89 for lunch and $21.25 for a pair of sunglasses.
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Answer:

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its really easy

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5 0
2 years ago
Show that the sum of the first 2n natural numbers is n(2n+1)
Leokris [45]

Answer:

This sum is the sum of an arithmetic sequence.  There is a formula for the sum of an arithmetic sequence which can be looked up or derived by a variety of means.

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There are n of these pairs.  So the desired sum is n x (first number + last number).   But the first number is 1 and the last on is 2n.   Thus the desired sum is n(1 + 2n).

Hope this helps!!

Mark Brainleast!!!!!!!!!!!

7 0
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3 years ago
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