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zzz [600]
3 years ago
15

Use the net to find the surface area of the prism

Mathematics
1 answer:
AnnZ [28]3 years ago
3 0

Answer:

360 in^3 (360 inches squared)

Step-by-step explanation:

Find area of each surface:

8 in*9 in=72 in^2

15 in*9 in=135 in^2

17 in*9 in=153 in^2

then, add up all the numbers:

72+135+153=360 in^3

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HELP ME PLSSSS!!!!!
ad-work [718]

Answer:

64\pi mm² or approximately 201.06 mm²

Step-by-step explanation:

If the diameter is 16 mm, the radius will be 8 mm.

Use the circle area formula, A = \pir², where r is the radius. Plug in 8 as r:

A = \pir²

A = \pi(8²)

A = 64\pi

So, the area of the circle is 64\pi mm² or approximately 201.06 mm²

3 0
2 years ago
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The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).
lesantik [10]

Answer:

(a).

S_{n} =  \frac{n}{2} (4n + 20) \\  \\S _{n - 1} =  \frac{(n - 1)}{2} (4n - 4 + 20) \\  \\ S _{n - 1} =  \frac{(n - 1)}{2} (4n + 16) \\  \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2}  \\   \\  { \boxed{S _{n - 1} =  {2 {n}^{2} + 6n - 8}}} \\

(b).

from general equation:

S _{n - 1} =  \frac{(n - 1)}{2} (4n + 16)

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16 =  \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d =  \frac{16}{n - 2}

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the Indian Ocean is 2/10 of the area of the world's oceans. what fraction represents the area of the remaining oceans that make
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