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morpeh [17]
3 years ago
9

The answer to the question

Mathematics
1 answer:
saveliy_v [14]3 years ago
7 0
You can’t really see the question
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A scuba diver is 240 feet below sea level and descends 50 feet further down to observe the sea life.
taurus [48]

Answer:

The new position is 190 feet below sea

Step-by-step explanation:

240-50=190

8 0
3 years ago
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If I run 6 miles per hour. How fast do I run in km per minute?
Firdavs [7]
9.66 - you just multiple 6 by 1.61
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Someone help me please
Kryger [21]

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точка шлифования

Step-by-step explanation:

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3 years ago
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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

\implies v=C_1\ln|t|+C_2

\implies y_2=\dfrac{\ln t}t

where we omit the second term because it's already accounted for by y_1.

3 0
3 years ago
In 1995 a gallon of gas used to cost $1.00 today a gallon of gas cost $4.00 what is the percent increase?
Wittaler [7]

Answer:

300%

Step-by-step

300% of 1.00$ is 4.00 because you are adding 1.00 + 300%

5 0
3 years ago
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