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Bond [772]
3 years ago
9

Please answer this question ONLY ANSWER IF YOU KNOW FOR SURE

Mathematics
2 answers:
Fittoniya [83]3 years ago
7 0
The answer is 540 m2 hope this helps
Mademuasel [1]3 years ago
4 0
When I see these things, I never know whether we're supposed to
include the bottom or not.

Here's what you have to know in order to solve this:

Area of a triangle = (1/2) (base) (height) .

That's it ! The rest is all just arithmetic.

-- It's a little hard to tell from the drawing, but I think
this thing has six sides.
Each side is a triangle, with base = 15m and height = 12m.
Area of each side = (1/2) (15m) (12m) = (1/2) (180m²) = 90 m²
Area of 6 uvum = (6 x 90 m²) = 540 m² . (That's choice-b.)

That takes care of the sides.
If the bottom is supposed to be included, then we notice that
the bottom is a hexagon. That note of "7.5√3 m" looks like
it's the distance from the center of the hexagon to each side.

If you connect that point to each vertex of the hexagon, then
you have 6 triangles down there. Each one has base = 15m
and height = 7.5√3 m .

Area of each section
= (1/2) (15m) (7.5√3 m)
= (1/2) (112.5 √3 m²)
= 56.25 √3 m² .

Area of all 6 uvum = (6) x (56.25 √3 m²) = 337.5 √3 m²
That's roughly 584.6 m² .

If the bottom is supposed to be included in the whole thing,
then the total surface area is

(540 m²) + (584.6 m²) = 1,124.6 m² (That's choice-c.)

I'm pretty sure the bottom is supposed to be included,
and choice-c is the correct answer.
Otherwise, there would have been no reason to bother
giving us that "7.5√3 m" measurement on the bottom.
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Naddik [55]

Answer:

Initial bacterias = 6006000

Altought I believe is safe to assume that the values were 192,000 and 384,000 instead of 192,192,000 and 384,384,000, in that case the initial bacterias is 6000

Step-by-step explanation:

A exponential growth follows this formula:

Bacterias  = C*rⁿ

C the initial amount

r the growth rate

n the number of time intervals

Bacterias (55 hours) = 192,192,000

Bacterias (66 hours) = 384,384,000

Bacterias(55hours)=C*r^{{\frac{55-t}{t}}} \\Bacterias (66hours) = C*r^{\frac{66-t}{t}}}

If you divide both you can get the growth rate:

\frac{Bacterias (66hours)}{Bacterias(55hours)}=\frac{C*r^{\frac{66-t}{t}}}{C*r^{{\frac{55-t}{t}}}} \\\frac{384,384,000}{192,192,000} =r^{\frac{66-t}{t} -\frac{55-t}{t} } \\2 =r^{\frac{11}{t}}

So with that r = 2 and each time interval correspond to 11 years

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Bacterias (55hours)=C*2^{\frac{55-11}{11} } 192,192,000 = C*32\\C= 6006000

7 0
3 years ago
19 is 25% of what number?
zepelin [54]

Answer:

19/25 * 100 = 76%

Step-by-step explanation:

3 0
3 years ago
What is the quotient for 18/1000
8_murik_8 [283]


well the quotient means the answer to a division, so in this case:

18 ÷ 1000 = 0.018

5 0
3 years ago
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Jan has 7 stickers. Her brother gives her 6 more stickers. Which doubles fact can you use to find how many stickers Jan has now?
horrorfan [7]
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7 + 7 = 14
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Mrs. Lin is sewing costumes for her grandchildren. She is making three lion costumes, one zebra costume, and two bear costumes.
stepladder [879]

Answer:

12\frac{1}{8}\ yd

Step-by-step explanation:

we know that

The total fabric that Mrs. Lin needs is equal to

3(1\frac{2}{3})+2\frac{5}{8}+2(2\frac{1}{4})

Convert mixed number to an improper fraction

1\frac{2}{3}=1+\frac{2}{3}=\frac{5}{3}

2\frac{5}{8}=2+\frac{5}{8}=\frac{21}{8}

2\frac{1}{4}=2+\frac{1}{4}=\frac{9}{4}

substitute

3(\frac{5}{3})+\frac{21}{8}+2(\frac{9}{4})

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Convert to mixed number

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