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Afina-wow [57]
3 years ago
15

The distance around a meter is 9619 ft. find the diameter of the crater .use 22/7 for pie

Mathematics
1 answer:
DochEvi [55]3 years ago
7 0
The circumference of a circle is found with the equation

C = 2 pi * r

Since we have the circumference we can find the radius.  Then once we have the radius we can determine the diameter.

9619 = 2 (22/7) r
multiply each side by 7

67333 = 2*22*r
67333 = 44r

divide each side by 44
r = 67333/44 = 1530.295 rounded to the nearest hundredth = 1530.30

The diameter is 2 x the radius, so

1530.30 x 2 = 3060.6 ft

The diameter of the crater is 3060.6 ft
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Use the procedures developed to find the general solution of the differential equation. (Let x be the independent variable.)
makkiz [27]

Solution :

Given :

2y''' + 15y'' + 24y' + 11y= 0

Let x = independent variable

(a_0D^n + a_1D^{n-1}+a_2D^{n-2} + ....+ a_n) y) =  Q(x)  is a differential equation.

If Q(x) \neq 0

It is non homogeneous then,

The general solution  = complementary solution + particular integral

If Q(x) = 0

It is called the homogeneous then the general solution =  complementary solution.

2y''' + 15y'' + 24y' + 11y= 0

$(2D^3+15D^2+24D+11)y=0$

Auxiliary equation,

$2m^3+15m^2+24m +11 = 0$

-1  | 2    15    24     11

   <u> | 0   -2    - 13    -11  </u>

      2    13    11       0

∴ 2m^2+13m+11=0

The roots are

$=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$=\frac{-13\pm \sqrt{13^2-4(11)(2)}}{2(2)}$

$=\frac{-13\pm9}{4}$

$=-5.5, -1$

So, m_1, m_2, m_3 = -1, -1, -5.5

Then the general solution is :

$= (c_1+c_2 x)e^{-x} + c_3 \ e^{-5.5x}$

 

8 0
3 years ago
A private shipping company will accept a box for domestic shipment only if the sum of its length and girth (distance around) doe
Gnesinka [82]
Let 4x = the girth (each side = x) Let y = the length 
4x + y = 114 maximum y = 114 - 4x 
volume = x^2 * y v = x^2 * (114 - 4x) v = 114x^2 - 4x^3 . . . . . . v is maximum (or minimum) when it's derivative = 0 v ' = 228x - 12x^2 
228x - 12x^2 = 0 12x * (19 - x) = 0 
x = 0 <=== this is obviously a minimum volume or x = 19 inches <=== for maximum volume 
4x + y = 1144*19 + y = 114y = 38 <=== 
The largest volume is 19 x 19 x 38
3 0
4 years ago
Which of the 5 is the answer
ahrayia [7]

Answer:

I think Letter E

Step-by-step explanation:

Because all r negative numbers

5 0
3 years ago
Savanna had 40 iris blooms last year. This year, she had 15% more iris blooms. How many more iris blooms did savanna have this y
slamgirl [31]
Lets begin with an example.

You have 100 apples. 40 % of your apples are 40. Sounds complicated?

Here is the calculation in words, number of apples times 40 percentage.

By equation: 100 * 40/100= 40. Simple huh?

% symbol represents 100. 
% 15 equals 15/100; 20% is equal to 20/100 or 1/5 in a simplified way.

Have a look to question. 40 iris at last year, 15 % MORE iris this year.

What is the 15 % of 40 iris? That's the question at the end.

Recall apple example at the beginning.

40 iris * 15/100 = 6.

So, there are 6 MORE iris blooms this year. This year Savanna has totally 46 iris.
5 0
4 years ago
Read 2 more answers
Help pleaseeeeeeeeeeeeeeeeee
arlik [135]

Answer:

Cant see the picture sorry

Step-by-step explanation:

7 0
3 years ago
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