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slamgirl [31]
3 years ago
7

What is the surface area of this shape? ​

Mathematics
2 answers:
ivanzaharov [21]3 years ago
4 0

Step-by-step explanation:

surface area if pyramid=area of base+combined area of lateral faces.

area of base=8×8=64

combined area if lateral faces=area of one triangle:area=base×height

=8×12=96

Total surface area=64+96

=160m square

aliya0001 [1]3 years ago
4 0

Answer:

SA = 254

Step-by-step explanation:

Equation for a Pyramid (Surface Area) is : 2bs + b^2

2(8)(12) + 8^{2} =

16 (12) = 192 and 8^2 = 62

192 + 62 = 254

I hope I helped ;)

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Serjik [45]
3 feet by 5 feet is the original figure.

We can obviously say that the triangle falls into the Not Similar - Different Shape category since it is a triangle, and we were given a rectangle

We can obviously say that the parallelogram (right next to the triangle) falls into the Not Similar - Different Shape category since it is a parallelogram, and we were given a rectangle

The 3 feet by 4 feet falls into the category of Not similar - Different ratio of Side Lengths because  the original was 3 feet by 4 feet. And so then one side remained the same while the other went decreased, so they are not in a ratio.

The 12 feet by 15 feet falls into the category of Not similar - Different ratio of Side Lengths because 12 feet by 15 feet can be simplified in a ratio of 4 to 5 while the original is 3 to 5

The 6 feet by 10 feet falls into the category of Similar because  6 feet by 10 feet can be simplified in a ratio of 3 to 5 and the original is 3 to 5.

The 3 feet by 5 feet falls into the category of Similar because  it is the same exact figure just rotated!
5 0
4 years ago
30 POINTS! Find an explicit formula for the geometric sequence −1,−7,−49,−343<br> d(n)=
e-lub [12.9K]

Answer:

<h2>d(n) = { - 7}^{n - 1}</h2>

Step-by-step explanation:

Since the sequence above is a geometric sequence

For an nth term in a geometric sequence

<h3>d(n) = a ({r})^{n - 1}</h3>

where

a is the first term

r is the common ratio

n is the nth term

To find the common ratio divide the previous term by the next term

That's

<h3>r =  \frac{ - 7}{ - 1}  = 7 \:  \:  \:  \: or \\ r =  \frac{ - 49}{ - 7}  = 7 \:  \:  \:  or \\ r =   \frac{ - 343}{ - 49}   = 7</h3>

So the common ratio / r = 7

the first term is - 1

Substitute the values into the above formula

<h3>d(n) =  - 1( {7})^{n - 1}  \\</h3>

We have the final answer as

<h3>d(n) = { - 7}^{n - 1}</h3>

Hope this helps you

3 0
4 years ago
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