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3 years ago

8

Un túnel se construye de manera que el claro sea un rectángulo de ancho X largo 2X. El concreto para sostenerlo en la parte de a

rriba tiene un espesor de 2M y a los lados un espesor de 1M. La superficie de la sección transversal del concreto es de 62 M2

1 answer:

Mnenie [13.5K]3 years ago

5 0

Answer:

bfghfghhghsgssfhfgggggggggggStep-by-step explanation:

hghgsrhgtgthtrh

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Two snakes race the speed of the first is 24 1/2 inches per minute and the speed of the other is 26 inches per minute how far ap

bezimeni [28]

Answer:

637, 245

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

by about how much will f(x,y,z) = In root x^2 +y^2 +z^2 change if the point P(x, y, z) moves from P0(2,2,6) a distance of ds = .

konstantin123 [22]

Answer:

$\frac{1}{44} \approx0.0227\hspace{3}units$

Step-by-step explanation:

In order to find the answer we need to calculate the directional derivative:

$D_uf(x,y,z)=\nabla f\bullet u$

$\nabla f =The\hspace{3}gradient\hspace{3}of\hspace{3}f\\u=Unit\hspace{3}vector$

The gradient of f is:

$\nabla f(x,y,z)=\langle\frac{x}{x^2+y^2+z^2}, \frac{y}{x^2+y^2+z^2},\frac{z}{x^2+y^2+z^2}\rangle$

The unit vector can be found as:

$u=\frac{v}{|v|} =\frac{3i+6j-2k}{\sqrt{3^2+6^2+(-2^2)} } =\langle\frac{3}{7} ,\frac{6}{7}, \frac{-2}{7} \rangle$

The directional derivative at the point is:

$D_uf(2,2,6)=\langle\frac{1}{22}, \frac{1}{22} ,\frac{3}{22} \rangle \bullet \langle \frac{3}{7} ,\frac{6}{7} ,\frac{-2}{7} \rangle =\frac{5}{22} \bullet \langle \frac{3}{7} ,\frac{6}{7} ,\frac{-2}{7} \rangle =\frac{5}{22}$

Finally, the problem tell us that the point moves a distance of 0.1 units. Hence f(x,y,z) will move:

$\frac{5}{22} * 0.1=\frac{1}{44}\approx 0.0227\hspace{3}units$

6 0

3 years ago

What’s is the result ?

nadezda [96]

Answer:

19

Step-by-step explanation:

• Shoes + Shoes + Shoes = 30

So, 1 Shoes = 10

• Man + Man + Shoes = 20

1 shoes = 10

20 - 10 = 10

2 man = 10

1 man = 10 ÷ 2 = 5

So, 1 man = 5

• x + x + Man = 13

(Idk what is that)

1 man = 5

13 - 5 = 8

2 x = 8

1 x = 8 ÷ 2 = 4

So, 1 x = 4

(Im seriously. Idk what is that (x))

We can conclude from that picture :

• Shoes + Shoes + Shoes

= 10 + 10 + 10

= 30

• Man + Man + Shoes

= 5 + 5 + 10

= 20

• x + x + Man

= 4 + 4 + 5

= 13

So, what if Shoes + Man + x = ...?

Shoes + Man + x

= 10 + 5 + 4

= <u>1</u><u>9</u>

So, the answer is 19

<em>Hope it helps and is useful</em><em> </em><em>:</em><em>)</em>

3 0

4 years ago

The satellite photos seemed to indicate

Dafna1 [17]

Answer:the warehouse's width is 100 feet.

Step-by-step explanation:

Let L represent the length of the rectangular warehouse.

Let W represent the width of the rectangular warehouse.

The rectangular warehouse was 20 feet longer than 3 times its width. This means that

L = 3W + 20

The perimeter of a rectangle is

the sum of all its sides. Therefore, the formula for determining the perimeter of a rectangle expressed as

Perimeter = (L + W)

If the perimeter of the warehouse was 840 feet, it means that

2(L + W) = 840

Dividing through by 2, it becomes

L + W = 420- - - - - - - - 1

Substituting L = 3W + 20 into equation 1, it becomes

3W + 20 + W = 420

4W = 420 - 20

4W = 400

W = 400/4 = 100

8 0

3 years ago

On a 10-item test, three students in professor hsin's advanced chemistry seminar received scores of 2, 5, and 8, respectively. f

swat32

The standard deviation is 5 because (2+5+8)/3=5. So the equal square root is square root of 25

3 0

3 years ago