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BigorU [14]
3 years ago
9

A wall that is 12 feet high on the building is 36 centimeters high on the model. Find the height on the model of a door that is

9 feet high on the building.
I already solved this one. The answer is 27. Im having trouble with part B.
(B) Find the number of centimeters on the model for a window that is 3 feet wide.
Mathematics
2 answers:
cluponka [151]3 years ago
8 0

Answer:

9cm

Step-by-step explanation:

3/12 is equal to 1/4 ratio between the size of the window and the building.

Apply that ratio to the the 36 centimeters to get 36/4 which is equal to 9 centimeters.

andre [41]3 years ago
4 0

Answer: 9 centimeters

Step-by-step explanation:

Hi, to answer this question we have to apply the same ratio applied to find the height in centimeters of the door.

12ft/36cm = 9ft/x cm

12/36= 9/x

x = 9/ (12/36)

x =27cm

Using the value of the window's wide instead of the door's height.

12/36 = 3/x

x = 3 / (12/36)

x = 9cm

Feel free to ask for more if needed or if you did not understand something.

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part b is: if the energy release of one earthquake is 10,000 times that of another, how much larger is the Richter scale reading
kotegsom [21]

You could use the information from part A to get B. I'm not sure if you want A or not, so I'll do it as well.

A

Eo = 10^4.4 Joules

E = 2 * 10^15

Formula

M = (2/3) log (E/Eo)

M = 2/3 * log (2 * 10^15/10^(4.4) )

M = 2/3 * log( 7.9621* 10^10)

M = 2/3 * 10.901

M = 7.26735 on the Richter scale. That is a huge amount of energy.

Part B

Suppose that you use Eo and your base. Eo is 10^4.4

Now the new earthquake is E = 10000 * Eo

So what you get now is M = (2/3)* Log(10000 * Eo / Eo )

The Eo's cancel out.

M = 2/3 * log(10000)

M = 2/3 of 4

M = 8/3

M = 2.6667 difference in the Richter Scale Reading. It is still an awful lot of energy.

What this tells you is that if the original reading was (say) 6 then the 10000 times bigger reading would 8.266667

Answer: M = 2.6667


8 0
3 years ago
Read 2 more answers
Adam has 16.45 kg of flour,and he uses 6.4 kg to make hot cross buns. The remaining flour is exactly enough to make 15 batches o
rewona [7]

If Adam has 16.45 kg of flour and he uses 6.4 kg to make hot cross buns, then he has left

16.45 - 6.4 = 10.05 kg of flour.

If Adam wants to use the remaining flour to make 15 batches of scones, then each batch of scones requires

10.05 : 15 = 0.67 kg of flour.

Answer: each batch of scones requires 0.67 kg of flour.

5 0
3 years ago
Read 2 more answers
1
irina [24]

Answer:

0.530 (the 0 is not required)

Step-by-step explanation:

this is because another combination would be .35 which is less than .53 so this what i think the answer is.

--hope this helped :))

7 0
3 years ago
Determine whether it’s always, never, or sometimes true. <br> I put never true. Is that right?
DiKsa [7]

Answer:

yes the answer is never true

Step-by-step explanation:

as the correct answer is

\sqrt{2x}

4 0
3 years ago
Please help I literally don’t understand this at all
mel-nik [20]

Answer:

x=13 y=10 z=3 d) 260

Step-by-step explanation:

vertex angles are congruent so you can set them equal to each other and solve

and then a straight like adds up to 180 so 180-(7(x-3)+5y)= your missing angle and then that angles is congruent to its opposite so 2(5z+15)=60

8 0
3 years ago
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