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Andre45 [30]
3 years ago
6

The population of a small town can be described by the equation PN equals 4000+70n. Where n is the number of years after 2005. E

xplain in words what this equation tells us about how the population is changing.
Mathematics
1 answer:
ruslelena [56]3 years ago
8 0

Answer:

The current population (in 2005) is 4000 because it is the constant. The slope tells us how many people are added to the population, so 70 per year. For ex. 2008 (2008- 2005 = 3=> 3 x 70 = 210 => 210 + 4000 = 4210).

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Use the method of reduction of order to find a second independent solution of the given differential equation. t2y'' + 3ty' + y
Charra [1.4K]

I assume you mean y_1=t^{-1}, and not y_1=t-1, since this doesn't satisfy the ODE.

Assume a second solution of the form y_2=vy_1, where v is a function of t. Then

{y_2}'=v'y_1+v{y_1}'

{y_2}''=v''y_1+2v'{y_1}'+v{y_1}''

Substituting into the ODE gives

t^2\left(\dfrac{v''}t-\dfrac{2v'}{t^2}+\dfrac{2v}{t^3}\right)+3t\left(\dfrac{v'}t-\dfrac v{t^2}\right)+\dfrac vt=0

\implies tv''+v'=0

\implies(tv')'=0

\implies tv'=C

\implies v'=\dfrac Ct

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3 0
3 years ago
3.) Which expression(s) are equivalent to 20?
Goryan [66]

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8 0
3 years ago
How many cups are 125 grams
KengaRu [80]

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
When g(x) = 3x, what is g(5)?
tamaranim1 [39]

Answer:

g(5) = 15

Explanation:

If the x in g(x) is 5 then the x beside 3 would also be 5.

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Hope this helps, good luck!

3 0
2 years ago
Read 2 more answers
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