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Tomtit [17]
3 years ago
6

What is the sum of the geometric sequence 1,3,9... if there were 11 terms?

Mathematics
1 answer:
Delicious77 [7]3 years ago
3 0

Answer:

88,573

Step-by-step explanation:

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A home builder wants to decorate the post at the bottom of a stairway. One way to do this is to glue a square-based pyramid to t
AysviL [449]

We have been given net of a pyramid. We are asked to find the total surface area of the pyramid.

The surface area of the pyramid will be area of base plus area of 4 triangular sides.

We have been given that base of pyramid is square, so area of base will be square of base side.

\text{Area of base}=(\text{10 in})^2=100\text{ in}^2

Let us find area of one triangular side.

\text{Area of triangle}=\frac{1}{2}\times \text{Base}\times\text{Height}

\text{Area of triangle}=\frac{1}{2}\times \text{10 in}\times\text{6 in}

\text{Area of triangle}=\text{5 in}\times\text{6 in}

\text{Area of triangle}=30\text{ in}^2

Now we will multiply area of one triangular face by 4 to find area of 4 triangular faces.

\text{Area of 4 triangular faces}=4\times 30\text{ in}^2

\text{Area of 4 triangular faces}=120\text{ in}^2

Total surface area of pyramid would be area of base plus area of 4 triangular faces.

\text{Total surface area of pyramid}=100\text{ in}^2+120\text{ in}^2

\text{Total surface area of pyramid}=220\text{ in}^2

Therefore, 220 square inches of copper sheet are needed to make one pyramid.

4 0
3 years ago
Explain why the polynomial 144x2 − 200x + 81 is not a perfect square.
Sloan [31]
The square root of 144x^2 = 12 x
and square root of + 81 = 9 or -9

if  this polynomial were a perfect square then its factors would be 
(12x - 9)(12x - 9)

but its not a perfect squre because (12x - 9)(12x - 9)  = 144x^2 - 216x + 81.
5 0
3 years ago
HELPP PLEASE!!!!!! ):
padilas [110]

Answer:

  1. -3
  2. \frac{3}{4}
  3. \frac{-1}{3}
  4. \frac{3}{16}
  5. \frac{3}{10000}

Step-by-step explanation:

8 0
3 years ago
Look at Attachment, giving a lot of points for the answer to questions.
tatiyna

Answer:

see below

Step-by-step explanation:

1.

m = (y2-y1)/(x2-x1)

    = (90-80)/(0-1)

     = 10/-1

   =-10

The slope is -10 ft/s

This means the height decreases 10 ft for every second that passes

This is not proportional because it has to go through the point (0,0)

4.

m = (y2-y1)/(x2-x1)

    = (1000-0)/(3-0)

     = 1000/3

   =1000/3

The slope is $1000/3

This means the 1000 dollars is sold every 3 days

This is proportional because it goes through the point (0,0) and has a constant slope

7 0
3 years ago
Read 2 more answers
Alex bought four 15-pound bags of dog food, three 4 1/2 pound bags of cat food, and two 1/2-pound bags of fish food. How many po
garri49 [273]

Answer:

15+4.5+0.5=20

Alex bought 20 pounds of pet food

Step-by-step explanation:

Hope this helps!!

BTW...if y'all have any questions for school (it can be any grade level or subject) just comment here and I will get to it as soon as I can!! ❤

6 0
3 years ago
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