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Harlamova29_29 [7]
3 years ago
10

Someone please help me with the surface area

Mathematics
2 answers:
Igoryamba3 years ago
7 0
Surface are just means that you need to find the area of every face, then add. 

TO find the Area of the rectangle do 16*8 = 128

For the triangle the area formula is b*h*1/2 So do 7*8*1/2= 28   

There are four sides total and two triangles and two rectangles so 28+28+128+128= 312

SO the surface area is 312 in cubed
zhannawk [14.2K]3 years ago
5 0
To find the Surface Area of a Triangular based prism you need to use the following formula:  SA= bXh÷2 X H (of the prism)

In the question you have shown, the height is 8in, the base is 7in, and the height of the prism is 16in

so SA= 7X8÷2X16
= 448in^2
Therefore the Surface Area is 448in^2. Hope that helped!!
You might be interested in
The trapezoid and kite have been broken for you.
faltersainse [42]

Answer:

  • 20 m²
  • 21 m²
  • less than

Step-by-step explanation:

<u>Trapezoid</u>

The trapezoid has been broken into two triangles and a rectangle. The two triangles both have the same dimensions, so both have the area ...

  A = (1/2)bh = (1/2)(2 m)(5 m) = 5 m²

The rectangle has area ...

  A = bh = (2 m)(5 m) = 10 m²

So, the total area of the trapezoid is ...

  trapezoid area = 5 m² +10 m² +5 m²

  trapezoid area = 20 m²

__

<u>Kite</u>

The kite has been broken into two triangles, so the area of each of them is ...

  A = (1/2)bh

  A = (1/2)(7 m)(3 m) = (21/2) m²

Then the area of the two halves of the kite will be ...

  kite area = 2 × (21/2 m²)

  kite area = 21 m²

__

The area of the trapezoid is <u>1 m² less than</u> the area of the kite.

6 0
3 years ago
La un concurs, se acordă 10 puncte pentru o problema rezolvată corect si se scad 2 puncte
mylen [45]

Answer:

2 wrongly solutions and 18 right solutions

Step-by-step explanation:

The computation is shown below:

= 20 (problems) × 10 (points)

= 200 points

And it received 176 points

So the difference is of

= 200 - 176

= 24

In the case of wrong solution, the points that are lost is

=  10 + 2

= 12

Now the solutions done wrongly is

= 24 ÷ 12

= 2

And, the solutions does rightly is

= 20 - 2

= 18

6 0
3 years ago
How large an equilateral triangle can you fit inside a 2-by-2 square?
nekit [7.7K]

Answer:

An equilateral triangle with a length of 2

Step-by-step explanation:

A 2-by-2 square implies that the square has a length and width of 2. Since equilateral triangles have the same length for all sides, it tells you that if one side is a certain length, all the other sides must have the same length. The largest length we can fit into this square would be 2 because any larger, the sides of the triangles would not fit into the square. Under the assumption that the length needs to be a whole number, the answer would be 2.

3 0
2 years ago
For his long distance phone service,Frank pays a $2 monthly fee plus 12 cents per minute.Last month, Franks long distance bill $
navik [9.2K]

Answer:

a total of 129 minutes

Step-by-step explanation:

$17.48 - $2 fixed monthly fee = $15.48

$15.48/0.12 = 129 minutes

8 0
3 years ago
A polling organization announces that the proportion of American voters who favor congressional term limits is 64%, with a 95% c
EastWind [94]

Answer:

Hence when C.I. is 80% then Margin of error will be 1.9591%

Step-by-step explanation:

Given:

1st Margin of error(MOE)=3%

1st C.I.=95%

2nd C.I.=80%

To Find:

MOE at 80%

Solution:

The proportion is 64 % i.e. is constant for both MOE

Proportion is given by (P),

P=x/n

Where x= favors congressional terms

n= total voters or sampled voters.

There values are same or constant.

i.e standard deviation is also constant

Now Formula for MOE is given by

MOE=Z*[Standard devation/Sqrt(n)]

here Z is value for confidence interval

MOE is directly proportional to the Z-value

So

MOE=K*Z-value         ... where k is proportionality constant.

MOE/Z-value              ....ratio is constant

So , for 95 % Z=1.96 and for 80% Z=1.28

MOE(1st)/(Z-value 1st)=MOE(2nd)/(Z-value 2nd)

3/1.96=MOE(2nd)/1.28

MOE(2nd)=(3/1.96)*1.28

MOE(2nd)=1.5306*1.28

=1.9591 %

5 0
3 years ago
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