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shtirl [24]
3 years ago
8

I need help to find the surface area to the nearest hundreds

Mathematics
1 answer:
Andre45 [30]3 years ago
5 0

Answer:

The volume of the pentagonal prism is 1446.25

Step-by-step explanation:

First of all we need to calculate the area of the pentagon

A = area

a =  apothem = 8.9

p = perimeter = 13 * 5 = 65

A = (a*p) / 2

A = (8.9 * 65) / 2

A = 578.5 / 2

A = 289.25

To calculate the volume of a pentagonal prism we have to use the following formula:

a = area =  289.25

v = volume

h = height  = 5

v = a * h

we replace the values that ​​we know        

v =   289.25 * 5

v = 1446.25

The volume of the pentagonal prism is 1446.25

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Find the distance between the points. Round your answer to the nearest tenth. (6, -1) and (-2,-6)​
alexdok [17]

Answer:

9.433981

Step-by-step explanation:

d=(−2−6)2+(−6−(−1))2−−−−−−−−−−−−−−−−−−−−−√  

d=(−8)2+(−5)2−−−−−−−−−−−−√

d=64+25−−−−−−√

d=8–√9

d=9.433981

6 0
3 years ago
Alanna is painting a border on a wall. The border consists of kite-shaped figures as shown. mc022-1.jpg Each kite measures 6 inc
Sedaia [141]

the question does not present the picture, but this does not interfere with the resolution


step 1

Find the area of a kite

we know that

area of a kite=(1/2)*[d1*d2]

where d1 and d2 are the diagonals

so 

area of a kite=(1/2)*[6*12]-----> 36 in²

<span>The wall is 12 feet across-----> convert to in-----> 12*12----> 144 in

step 2
find the number of kite to paint
divide across of the wall to across of a kite
144/6-----> 24 

step 3
find the n</span><span>umber of square inches of the wall to be covered with comets
</span>24*area of one kite-----> 24*36-----> 864 in²

the answer is 864 in²
<span>Note For this calculation, as there is no drawing we have assumed that the diagonal of the 6-inch kite is horizontal
</span>
case b) 
<span>If the diagonal of the 12-inch kite was horizontal, then the calculation would be
</span>step 2
find the number of kite to paint
divide across of the wall to across of a kite
144/12-----> 12

step 3
find the number of square inches of the wall to be covered with comets
12*area of one kite-----> 12*36-----> 432 in²

the answer would be 432 in²


5 0
4 years ago
The length of the rectangle is 2x + 8 cm and the width is 2cm . The area of the rectangle is 12 cm​
Ksju [112]

Answer:

x = - 1

Step-by-step explanation:

Length ( l ) = 2x + 8 cm

Width / Breadth ( b ) = 2 cm

Area ( rectangle ) = 12 cm

Formula : -

Area ( rectangle ) = lb

12 = ( 2x + 8 ) ( 2 )

Divide 2 on both sides,

12 / 2 = ( 2x + 8 ) ( 2 ) / 2

6 = 2x + 8

2x + 8 = 6

2x = 6 - 8

2x = - 2

x = - 2 / 2

x = - 1

5 0
3 years ago
self-service car wash charges $4 for the initial 5 minutes plus an additional $0.75 for each minute after that. Nick only has $1
wlad13 [49]
4 + .75m =10 i am not a math expert but i hope this helps
6 0
3 years ago
Read 2 more answers
Type in your answer as a reduced mixed number with the negative in front of the whole number. -8 3/4 + -11 1/3
Arada [10]

Answer:

hope it will help you ...

4 0
3 years ago
Read 2 more answers
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