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natka813 [3]
3 years ago
6

What is formula to calculate the area of circle​

Mathematics
2 answers:
Bond [772]3 years ago
8 0

Step-by-step explanation:

Area of circle

= \pi {r}^{2}

r = radius of the circle

agasfer [191]3 years ago
6 0

Answer:

\pir²

Step-by-step explanation:

A=\pir²

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The differential equation of a certain system is 20⁢y′⁢′+c⁢y′+80⁢y=0
Sholpan [36]

Answer:

c=80

Step-by-step explanation:

Based on my reading the critical damping occurs when the discriminant of the quadratic characteristic equation is 0.

So let's see that characteristic equation:

20⁢r^2+c⁢r+80⁢=0

The discriminant can be found by calculating b^2-4aC of ar^2+br+C=0.

a=20

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C=80

c^2-4(20)(80)

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c^2-4(20)(80)=0

Simplify:

c^2-6400=0

Add 6400 on both sides:

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Based on further reading damping equations in form

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should have positive coefficients with b also having the possibility of being zero.

5 0
3 years ago
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dolphi86 [110]
I believe the answer is-
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Standard form of -2x^2+8x+5
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A farmer plants twice as many acres of wheat as corn on his land. If he plants no more than 36 acres, what is the greatest numbe
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Answer: 12 acres could be planted (at most)

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