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kompoz [17]
3 years ago
14

30 is 12% of what numbr

Mathematics
1 answer:
ruslelena [56]3 years ago
5 0

30 IS 12% OF 250

HOPE IT HELPS! :D

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Please help!!!!!!!!!!
Gnoma [55]

Answer:

The surface of the prism is 84m²

Step-by-step explanation:

You have 4 figures here (two the same triangles)

you need to determine the surface of each and then sum it to one. This will be your final surface.

rectangles:

3*6= 18m²

5*6 = 30m²

4*6 = 24m²

triangles:

You need to determine the square of the triangles from the Heron's formula.

Heron's formula states that the area of a triangle whose sides have lengths a, b, and c is

S=\sqrt{s(s-a)(s-b(s-c)},

where s is the semi-perimeter of the triangle; that is,

s=\frac{a+b+c}{2}.

So the permimeter of the triangle is

2p=4+5+3 = 12m

p = 6m

S = \sqrt{p*(p-a)*(p-b)*(p-c)}  = \sqrt{6*(6-3)*(6-4)*(6-5)}  = \sqrt{6*3*2*1} =\sqrt{36} =6[m^{2} ]

So the surface of the prism is a total sum of all surfaces:

P = 18m²+30m²+ 24m²+2*6m² = 84m²

6 0
3 years ago
PLEASE help i only have 2 more questions on the same concept! and i still cant get it right :(
Law Incorporation [45]

Answer:

343 gallons, So Sarah dumped water in the pool each minute consists of 7 gallons so if she did it for 49 minutes, thats 7 gallons each for each minute. So you do 7 times 49 which gives you how many gallons in those total minutes.

-10 Fish because they re removing fish they removed 60 for 6 days so you have to figure out how many fish they have removed each day so 60 fish divided by how many days equals how many fish they have taken out each day.


Im sorry i forgot the negative again lol


4 0
3 years ago
What is 20% of 96,000 in math?
AVprozaik [17]
19200

just multiply 0.2 x 96,000
4 0
3 years ago
Read 2 more answers
Find f'(x)
max2010maxim [7]
Use the website Symbolab. It's helped with all of my calculus problems.
4 0
3 years ago
Read 2 more answers
i am not 42 but i am an EVEN number. i am more than 25 but less than 50. i am a multiple of 6 but do not have a digit of 3.
sertanlavr [38]
So easyies way is find all multiplues of 6 that are less than 50

6
12
18
24
30
36
42
48

and not 42
6
12
18
24
30
36
48
more than 25
30
35
48

do not have a 3 in them
48

the answer is 48

5 0
3 years ago
Read 2 more answers
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