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3 years ago

7

Help with math pls mfs pls

1 answer:

Allushta [10]3 years ago

6 0

Answer:

pi

Step-by-step explanation:

pi is the way us pi and radius

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Find the flow rate through a tube of radius 6 cm, assuming that the velocity of fluid particles at a distance r cm from the cent

vaieri [72.5K]

Answer:

791.68 cm/s

Step-by-step explanation:

The volume flow rate can be interpreted as the integral of fluid velocity over area

$\dot{V} = \int\limits^6_0 {v(r) 2\pi r} \, dr\\\dot{V} = 2\pi\int\limits^6_0 {(25-r^2)r} \, dr\\\dot{V} = 2\pi\int\limits^6_0 {25r-r^3} \, dr\\\\\dot{V} = 2\pi[12.5r^2 - r^4/4]_0^6\\\dot{V} = 2\pi(12.5*6^2 - 6^4/4 - 12.5*0 - 0)\\\dot{V} = 2\pi*126 = 791.68 cm/s$

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4 years ago

Which of the following describes the number 0.5? A. irrational, terminating decimal

Oksanka [162]

Answer:

D

Step-by-step explanation:

0.5 can be written as a fraction and 0.5 doesn't repeat

6 0

3 years ago

Read 2 more answers

Examine the pattern of numbers in the table , and find a formala for y in terms of x.

lana66690 [7]

Plotting the points could help you notice that they lie along a parabola. In particular, you can see that $y$ is always 4 more than $x^2$ .

So, the relation is

$y=x^2+4$

4 0

3 years ago

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Find the value of x, 2:7::x:49

musickatia [10]

Answer: x = 14

Step-by-step explanation:

-x+14 = 0

Subtract 14 from both sides of the equation :

-x = -14

Multiply both sides of the equation by (-1) : x = 14

7 0

3 years ago

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Solve for x in the equation x squared + 11 x + StartFraction 121 Over 4 EndFraction = StartFraction 125 Over 4 EndFraction.

telo118 [61]

Answer:

x = -13 or 2

Step-by-step explanation:

x² + 11x + ¹²¹/₄ = ¹²⁵/₄

(x + ¹¹/₂)² = ¹²⁵/₄

x + ¹¹/₂ = ±¹⁵/₂

x = -¹¹/₂ ± ¹⁵/₂

x = -13 or 2

8 0

3 years ago