Answer: 
Step-by-step explanation:
To find the solution of a given differential equation ay''+by'+cy=0, a≠0, you have to consider the quadratic polynomial ax²+bx+c=0, called the characteristic polynomial.
Using the quadratic formula, this polynomial will always have one or two roots, for example r and s. The general solution of the differential equation is:
, if the roots r and s are real numbers and r≠s.
, if r=s is real.
, if the roots r and s are complex numbers α+βi and α−βi
.
In this case, the characteristic polynomial is:

Since the roots are complex numbers, with α=0 and β=1, then the answer is: 
Answer:
1)
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2)
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3)
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4)
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Step-by-step explanation:
<u>Verify each case</u>
case 1) 
<em>Find the area with the original dimensions</em>

Reduce the area of the poster by one-third

therefore
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case 2) 
<em>Find the area with the original dimensions</em>

Reduce the area of the poster by one-third

therefore
--------> 
case 3) 
<em>Find the area with the original dimensions</em>

Reduce the area of the poster by one-third

therefore
--------> 
case 4) 
<em>Find the area with the original dimensions</em>

Reduce the area of the poster by one-third

therefore
--------> 
Answer:
d = 1000 is the correct answer to that question
Divide change in the output value by the change in the input value for example in this question the rate on the y=+5 and on the x value it’s +1