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Usimov [2.4K]
3 years ago
10

the floors of houses in japan are traditionally covered by tatami. tatami are rectangle shaped straw mats that measure about 6 f

eet by 3 feet. if a room is 48 feet by 24 feet, how many tatami are needed to cover the floor
Mathematics
1 answer:
Masja [62]3 years ago
4 0
8 Tatami mats are needed to cover the floor.
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The question is in the picture
yawa3891 [41]

Answer: May you show the angle we are supposed to solve? its a bit unclear. or can you explain the angle to us?

Step-by-step explanation:

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3 years ago
D^2(y)/(dx^2)-16*k*y=9.6e^(4x) + 30e^x
MA_775_DIABLO [31]
The solution depends on the value of k. To make things simple, assume k>0. The homogeneous part of the equation is

\dfrac{\mathrm d^2y}{\mathrm dx^2}-16ky=0

and has characteristic equation

r^2-16k=0\implies r=\pm4\sqrt k

which admits the characteristic solution y_c=C_1e^{-4\sqrt kx}+C_2e^{4\sqrt kx}.

For the solution to the nonhomogeneous equation, a reasonable guess for the particular solution might be y_p=ae^{4x}+be^x. Then

\dfrac{\mathrm d^2y_p}{\mathrm dx^2}=16ae^{4x}+be^x

So you have

16ae^{4x}+be^x-16k(ae^{4x}+be^x)=9.6e^{4x}+30e^x
(16a-16ka)e^{4x}+(b-16kb)e^x=9.6e^{4x}+30e^x

This means

16a(1-k)=9.6\implies a=\dfrac3{5(1-k)}
b(1-16k)=30\implies b=\dfrac{30}{1-16k}

and so the general solution would be

y=C_1e^{-4\sqrt kx}+C_2e^{4\sqrt kx}+\dfrac3{5(1-k)}e^{4x}+\dfrac{30}{1-16k}e^x
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Mia spends 45 min reading each day. She does 2/5 of her reading at school. How many minutes does Mia spend reading at school?
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Mia spends 18 minutes reading at school.
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Read 2 more answers
You deposit $800 in an account that pays 2.65% annual interest compounded continuously. What is the balance after 12 years? Use
balu736 [363]

Answer:Let P = initial investment

     r = annual interest rate (decimal form)

     t = number of years

   A(t) = amount after t years

 

Then, A(t) = Pert

 

A(12.5) = 800e(0.0265)(12.5)

 

             = 800e0.33125

 

             = $1114.17

Step-by-step explanation:

4 0
2 years ago
Trey runs 4 miles in 30 minutes. at the same rate, how many miles would he run in 48 minutes?
Illusion [34]
To find that 4÷30*48=6.39
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