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zhuklara [117]
2 years ago
8

Find the surface area of the pyramid.

Mathematics
1 answer:
Mashutka [201]2 years ago
7 0

Answer:

319

Step-by-step explanation:

So, to find the surface area, first we find the base area, which is: 11 x 11 = 121

Then, we have to find the area of the other faces. Since each face is a triangle, we can use the formula A = 1/2 x b x h.

So,

b = 11

h = 9

1/2 x 11 x 9 = 49.5

The, we multiply by 4, the number of sides: 49.5 x 4 = 198

Then, we add the 2, values: 121 + 198,

Which gives us: 319.

Hope this helped!

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What are two decimals equivalent to 9.1
Marizza181 [45]
To get equivalent decimals you times the decimal by a number for example 2 
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the answers are 18.2 and 27.3 and obviously other ones to...
i hope this helped :)
8 0
3 years ago
Use the equation below to find c, if a = 39 and b= 27.<br> c=180-a-b<br> c=0<br> X<br> 5 ?
vfiekz [6]

Answer:

the answer is 114

Step-by-step explanation:

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2 years ago
Suppose you are covering your desk (shape below) with paper and want to know how many square inches of paper you need.
zavuch27 [327]

Answer:

a. Divide the figure into two rectangles, find the area of each rectangle and add them (See the picture attached).

b. 279\ in^2

c. The total area of the figure is 279 square inches.

Step-by-step explanation:

a. Divide the figure into two rectangles (See the picture attached), then find the area of each rectangle and finally, add the areas calculated in order to get the total area of the given figure,

b. The area of a rectangle can be found using this formula:

A=lw

Where "l" is lenght  and "w" is the width.

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You can identify that:

l_A=19\ in\\\\w_A=11\ in

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A_A=(19\ in)(11\ in)=209\ in^2

Area of Rectangle B

You can identify that:

l_B=10\ in\\\\w_B=18\ in-11\ in=7\ in

Then, its area is:

A_B=(10\ in)(7\ in)=70\ in^2

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3 0
3 years ago
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ruslelena [56]

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The graph fails the vertical line test.  In other words, when you draw a vertical line anywhere through the curve, the line passes through two points.

Bonus: If you do not have a graph, it is not a function if there is one x-value that has two different y-values.

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4 0
3 years ago
What is the population density of the US if the area of the United States is 4,000 square miles?
scoray [572]

Answer:

82050 people/mi^2

Step-by-step explanation:

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I hope this helps! :)

7 0
3 years ago
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